diff --git a/core/modules/contact/config/contact.category.feedback.yml b/core/modules/contact/config/contact.category.feedback.yml
new file mode 100644
index 0000000..7d3c686
--- /dev/null
+++ b/core/modules/contact/config/contact.category.feedback.yml
@@ -0,0 +1,5 @@
+id: feedback
+label: Website feedback
+recipients: []
+reply: ''
+weight: '0'
diff --git a/core/modules/contact/contact.admin.inc b/core/modules/contact/contact.admin.inc
index f6835f9..3dae818 100644
--- a/core/modules/contact/contact.admin.inc
+++ b/core/modules/contact/contact.admin.inc
@@ -5,6 +5,8 @@
  * Admin page callbacks for the Contact module.
  */
 
+use Drupal\contact\Category;
+
 /**
  * Page callback: Lists contact categories.
  *
@@ -19,23 +21,18 @@ function contact_category_list() {
   );
   $rows = array();
 
-  // Get all the contact categories from the database.
-  $categories = db_select('contact', 'c')
-    ->addTag('translatable')
-    ->fields('c', array('cid', 'category', 'recipients', 'selected'))
-    ->orderBy('weight')
-    ->orderBy('category')
-    ->execute()
-    ->fetchAll();
+  $categories = entity_load_multiple('contact_category');
+  uasort($categories, 'Drupal\config\ConfigurableBase::sort');
+  $default_category = config('contact.settings')->get('default_category');
 
   // Loop through the categories and add them to the table.
   foreach ($categories as $category) {
     $rows[] = array(
-      check_plain($category->category),
-      check_plain($category->recipients),
-      ($category->selected ? t('Yes') : t('No')),
-      l(t('Edit'), 'admin/structure/contact/edit/' . $category->cid),
-      l(t('Delete'), 'admin/structure/contact/delete/' . $category->cid),
+      check_plain($category->label()),
+      check_plain(implode(', ', $category->recipients)),
+      ($default_category == $category->id() ? t('Yes') : t('No')),
+      l(t('Edit'), 'admin/structure/contact/manage/' . $category->id()),
+      l(t('Delete'), 'admin/structure/contact/manage/' . $category->id() . '/delete'),
     );
   }
 
@@ -57,68 +54,70 @@ function contact_category_list() {
 /**
  * Form constructor for the category edit form.
  *
- * @param $category
- *   An array describing the category to be edited. May be empty for new
- *   categories. Recognized array keys are:
- *   - category: The name of the category.
- *   - recipients: A comma-separated list of recipients.
- *   - reply: (optional) The body of the auto-reply message.
- *   - weight: The weight of the category.
- *   - selected: Boolean indicating whether the category should be selected by
- *     default.
- *   - cid: The category ID for which the form is to be displayed.
+ * @param Drupal\contact\Category $category
+ *   (optional) The contact category to be edited.
  *
  * @see contact_menu()
  * @see contact_category_edit_form_validate()
  * @see contact_category_edit_form_submit()
  * @ingroup forms
  */
-function contact_category_edit_form($form, &$form_state, array $category = array()) {
-  // If this is a new category, add the default values.
-  $category += array(
-    'category' => '',
-    'recipients' => '',
-    'reply' => '',
-    'weight' => 0,
-    'selected' => 0,
-    'cid' => NULL,
-  );
+function contact_category_edit_form($form, &$form_state, Category $category = NULL) {
+  // During initial form build, add the entity to the form state for use
+  // during form building and processing. During a rebuild, use what is in the
+  // form state.
+  if (!isset($form_state['contact_category'])) {
+    if (!isset($category)) {
+      $category = entity_create('contact_category', array());
+    }
+    $form_state['contact_category'] = $category;
+  }
+  else {
+    $category = $form_state['contact_category'];
+  }
 
-  $form['category'] = array(
+  $default_category = config('contact.settings')->get('default_category');
+
+  $form['label'] = array(
     '#type' => 'textfield',
-    '#title' => t('Category'),
+    '#title' => t('Label'),
     '#maxlength' => 255,
-    '#default_value' => $category['category'],
+    '#default_value' => $category->label(),
     '#description' => t("Example: 'website feedback' or 'product information'."),
     '#required' => TRUE,
   );
+  $form['id'] = array(
+    '#type' => 'machine_name',
+    '#default_value' => $category->id(),
+    '#machine_name' => array(
+      'exists' => 'contact_category_load',
+      'source' => array('label'),
+    ),
+    '#disabled' => (bool) $category->id(),
+  );
   $form['recipients'] = array(
     '#type' => 'textarea',
     '#title' => t('Recipients'),
-    '#default_value' => $category['recipients'],
+    '#default_value' => implode(', ', $category->recipients),
     '#description' => t("Example: 'webmaster@example.com' or 'sales@example.com,support@example.com' . To specify multiple recipients, separate each e-mail address with a comma."),
     '#required' => TRUE,
   );
   $form['reply'] = array(
     '#type' => 'textarea',
     '#title' => t('Auto-reply'),
-    '#default_value' => $category['reply'],
+    '#default_value' => $category->reply,
     '#description' => t('Optional auto-reply. Leave empty if you do not want to send the user an auto-reply message.'),
   );
   $form['weight'] = array(
     '#type' => 'weight',
     '#title' => t('Weight'),
-    '#default_value' => $category['weight'],
+    '#default_value' => $category->weight,
     '#description' => t('When listing categories, those with lighter (smaller) weights get listed before categories with heavier (larger) weights. Categories with equal weights are sorted alphabetically.'),
   );
   $form['selected'] = array(
     '#type' => 'checkbox',
     '#title' => t('Make this the default category.'),
-    '#default_value' => $category['selected'],
-  );
-  $form['cid'] = array(
-    '#type' => 'value',
-    '#value' => $category['cid'],
+    '#default_value' => $default_category === $category->id(),
   );
   $form['actions'] = array('#type' => 'actions');
   $form['actions']['submit'] = array(
@@ -138,24 +137,13 @@ function contact_category_edit_form_validate($form, &$form_state) {
   // Validate and each e-mail recipient.
   $recipients = explode(',', $form_state['values']['recipients']);
 
-  // When creating a new contact form, or renaming the category on an existing
-  // contact form, make sure that the given category is unique.
-  $category = $form_state['values']['category'];
-  $query = db_select('contact', 'c')->condition('c.category', $category, '=');
-  if (!empty($form_state['values']['cid'])) {
-    $query->condition('c.cid', $form_state['values']['cid'], '<>');
-  }
-  if ($query->countQuery()->execute()->fetchField()) {
-    form_set_error('category', t('A contact form with category %category already exists.', array('%category' => $category)));
-  }
-
   foreach ($recipients as &$recipient) {
     $recipient = trim($recipient);
     if (!valid_email_address($recipient)) {
       form_set_error('recipients', t('%recipient is an invalid e-mail address.', array('%recipient' => $recipient)));
     }
   }
-  $form_state['values']['recipients'] = implode(',', $recipients);
+  $form_state['values']['recipients'] = $recipients;
 }
 
 /**
@@ -164,48 +152,57 @@ function contact_category_edit_form_validate($form, &$form_state) {
  * @see contact_category_edit_form_validate()
  */
 function contact_category_edit_form_submit($form, &$form_state) {
+  // Update the default category.
+  $contact_config = config('contact.settings');
   if ($form_state['values']['selected']) {
-    // Unselect all other contact categories.
-    db_update('contact')
-      ->fields(array('selected' => '0'))
-      ->execute();
+    $contact_config
+      ->set('default_category', $form_state['values']['id'])
+      ->save();
   }
-
-  if (empty($form_state['values']['cid'])) {
-    drupal_write_record('contact', $form_state['values']);
-  }
-  else {
-    drupal_write_record('contact', $form_state['values'], array('cid'));
+  // If it was the default category, empty out the setting.
+  elseif ($contact_config->get('default_category') == $form_state['values']['id']) {
+    $contact_config
+      ->clear('default_category')
+      ->save();
   }
 
-  drupal_set_message(t('Category %category has been saved.', array('%category' => $form_state['values']['category'])));
-  watchdog('contact', 'Category %category has been saved.', array('%category' => $form_state['values']['category']), WATCHDOG_NOTICE, l(t('Edit'), 'admin/structure/contact/edit/' . $form_state['values']['cid']));
+  // Remove the 'selected' value, which is not part of the Category.
+  unset($form_state['values']['selected']);
+  form_state_values_clean($form_state);
+
+  $category = $form_state['contact_category'];
+  entity_form_submit_build_entity('contact_category', $category, $form, $form_state);
+
+  $category->save();
+
+  drupal_set_message(t('Category %label has been saved.', array('%label' => $category->label())));
+  watchdog('contact', 'Category %label has been saved.', array('%label' => $category->label()), WATCHDOG_NOTICE, l(t('Edit'), 'admin/structure/contact/manage/' . $category->id()));
+
   $form_state['redirect'] = 'admin/structure/contact';
 }
 
 /**
  * Form constructor for the contact category deletion form.
  *
- * @param $contact
- *   Array describing the contact category to be deleted. See the documentation
- *   of contact_category_edit_form() for the recognized keys.
+ * @param Drupal\contact\Category $category
+ *   The contact category to be deleted.
  *
  * @see contact_menu()
  * @see contact_category_delete_form_submit()
  */
-function contact_category_delete_form($form, &$form_state, array $contact) {
-  $form['contact'] = array(
+function contact_category_delete_form($form, &$form_state, Category $category) {
+  $form_state['contact_category'] = $category;
+  $form['id'] = array(
     '#type' => 'value',
-    '#value' => $contact,
+    '#value' => $category->id(),
   );
 
   return confirm_form(
     $form,
-    t('Are you sure you want to delete %category?', array('%category' => $contact['category'])),
+    t('Are you sure you want to delete %label?', array('%label' => $category->label())),
     'admin/structure/contact',
     t('This action cannot be undone.'),
-    t('Delete'),
-    t('Cancel')
+    t('Delete')
   );
 }
 
@@ -213,14 +210,11 @@ function contact_category_delete_form($form, &$form_state, array $contact) {
  * Form submission handler for contact_category_delete_form().
  */
 function contact_category_delete_form_submit($form, &$form_state) {
-  $contact = $form['contact']['#value'];
-
-  db_delete('contact')
-    ->condition('cid', $contact['cid'])
-    ->execute();
+  $category = $form_state['contact_category'];
+  $category->delete();
 
-  drupal_set_message(t('Category %category has been deleted.', array('%category' => $contact['category'])));
-  watchdog('contact', 'Category %category has been deleted.', array('%category' => $contact['category']), WATCHDOG_NOTICE);
+  drupal_set_message(t('Category %label has been deleted.', array('%label' => $category->label())));
+  watchdog('contact', 'Category %label has been deleted.', array('%label' => $category->label()), WATCHDOG_NOTICE);
 
   $form_state['redirect'] = 'admin/structure/contact';
 }
diff --git a/core/modules/contact/contact.info b/core/modules/contact/contact.info
index eff6d33..b04cd1d 100644
--- a/core/modules/contact/contact.info
+++ b/core/modules/contact/contact.info
@@ -4,3 +4,4 @@ package = Core
 version = VERSION
 core = 8.x
 configure = admin/structure/contact
+dependencies[] = config
diff --git a/core/modules/contact/contact.install b/core/modules/contact/contact.install
index f956242..ee83410 100644
--- a/core/modules/contact/contact.install
+++ b/core/modules/contact/contact.install
@@ -6,65 +6,6 @@
  */
 
 /**
- * Implements hook_schema().
- */
-function contact_schema() {
-  $schema['contact'] = array(
-    'description' => 'Contact form category settings.',
-    'fields' => array(
-      'cid' => array(
-        'type' => 'serial',
-        'unsigned' => TRUE,
-        'not null' => TRUE,
-        'description' => 'Primary Key: Unique category ID.',
-      ),
-      'category' => array(
-        'type' => 'varchar',
-        'length' => 255,
-        'not null' => TRUE,
-        'default' => '',
-        'description' => 'Category name.',
-        'translatable' => TRUE,
-      ),
-      'recipients' => array(
-        'type' => 'text',
-        'not null' => TRUE,
-        'size' => 'big',
-        'description' => 'Comma-separated list of recipient e-mail addresses.',
-      ),
-      'reply' => array(
-        'type' => 'text',
-        'not null' => TRUE,
-        'size' => 'big',
-        'description' => 'Text of the auto-reply message.',
-      ),
-      'weight' => array(
-        'type' => 'int',
-        'not null' => TRUE,
-        'default' => 0,
-        'description' => "The category's weight.",
-      ),
-      'selected' => array(
-        'type' => 'int',
-        'not null' => TRUE,
-        'default' => 0,
-        'size' => 'tiny',
-        'description' => 'Flag to indicate whether or not category is selected by default. (1 = Yes, 0 = No)',
-      ),
-    ),
-    'primary key' => array('cid'),
-    'unique keys' => array(
-      'category' => array('category'),
-    ),
-    'indexes' => array(
-      'list' => array('weight', 'category'),
-    ),
-  );
-
-  return $schema;
-}
-
-/**
  * Implements hook_install().
  */
 function contact_install() {
@@ -72,18 +13,15 @@ function contact_install() {
   if (empty($site_mail)) {
     $site_mail = ini_get('sendmail_from');
   }
-  // Insert a default contact category.
-  db_insert('contact')
-    ->fields(array(
-      'category' => 'Website feedback',
-      'recipients' => $site_mail,
-      'selected' => 1,
-      'reply' => '',
-    ))
-    ->execute();
+  config('contact.category.feedback')->set('recipients', array($site_mail))->save();
 }
 
 /**
+ * @addtogroup updates-7.x-to-8.x
+ * @{
+ */
+
+/**
  * Moves contact setting from variable to config.
  *
  * @ingroup config_upgrade
@@ -95,3 +33,49 @@ function contact_update_8000() {
     'contact_threshold_window' => 'flood.interval',
   ));
 }
+
+/**
+ * Migrate contact categories into configuration.
+ *
+ * @ingroup config_upgrade
+ */
+function contact_update_8001() {
+  $result = db_query('SELECT * FROM {contact}');
+  foreach ($result as $category) {
+    // Generate machine readable names.
+    if ($category->category == 'Website feedback') {
+      // Use default id for unchanged category.
+      $category->id = 'feedback';
+    }
+    else {
+      $category->id = drupal_strtolower($category->category);
+      $category->id = preg_replace('@[^a-z0-9]@', '_', $category->id);
+    }
+    // Save default category setting.
+    if ($category->selected) {
+      config('contact.settings')
+        ->set('default_category', $category->id)
+        ->save();
+    }
+    // Save the config object.
+    config('contact.category.' . $category->id)
+      ->set('id', $category->id)
+      ->set('label', $category->category)
+      ->set('recipients', explode(',', $category->recipients))
+      ->set('reply', $category->reply)
+      ->set('weight', $category->weight)
+      ->save();
+  }
+}
+
+/**
+ * Drop the {contact} table.
+ */
+function contact_update_8002() {
+  db_drop_table('contact');
+}
+
+/**
+ * @} End of "defgroup updates-7.x-to-8.x".
+ * The next series of updates should start at 9000.
+ */
diff --git a/core/modules/contact/contact.module b/core/modules/contact/contact.module
index 1ba70b9..34678f7 100644
--- a/core/modules/contact/contact.module
+++ b/core/modules/contact/contact.module
@@ -5,6 +5,8 @@
  * Enables the use of personal and site-wide contact forms.
  */
 
+use Drupal\contact\Category;
+
 /**
  * Implements hook_help().
  */
@@ -71,15 +73,15 @@ function contact_menu() {
     'weight' => 1,
     'file' => 'contact.admin.inc',
   );
-  $items['admin/structure/contact/edit/%contact'] = array(
+  $items['admin/structure/contact/manage/%contact_category'] = array(
     'title' => 'Edit contact category',
     'page callback' => 'drupal_get_form',
     'page arguments' => array('contact_category_edit_form', 4),
     'access arguments' => array('administer contact forms'),
     'file' => 'contact.admin.inc',
   );
-  $items['admin/structure/contact/delete/%contact'] = array(
-    'title' => 'Delete contact',
+  $items['admin/structure/contact/manage/%contact_category/delete'] = array(
+    'title' => 'Delete contact category',
     'page callback' => 'drupal_get_form',
     'page arguments' => array('contact_category_delete_form', 4),
     'access arguments' => array('administer contact forms'),
@@ -147,21 +149,84 @@ function _contact_personal_tab_access($account) {
 }
 
 /**
+ * Implements MODULE_config_import_create().
+ */
+function contact_config_import_create($name, $new_config, $old_config) {
+  if (strpos($name, 'contact.category.') !== 0) {
+    return FALSE;
+  }
+
+  $category = entity_create('contact_category', $new_config->get());
+  $category->save();
+  return TRUE;
+}
+
+/**
+ * Implements MODULE_config_import_change().
+ */
+function contact_config_import_change($name, $new_config, $old_config) {
+  if (strpos($name, 'contact.category.') !== 0) {
+    return FALSE;
+  }
+
+  list(, , $id) = explode('.', $name);
+  $category = entity_load('contact_category', $id);
+
+  $category->original = clone $category;
+  foreach ($old_config->get() as $property => $value) {
+    $category->original->$property = $value;
+  }
+
+  foreach ($new_config->get() as $property => $value) {
+    $category->$property = $value;
+  }
+
+  $category->save();
+  return TRUE;
+}
+
+/**
+ * Implements MODULE_config_import_delete().
+ */
+function contact_config_import_delete($name, $new_config, $old_config) {
+  if (strpos($name, 'contact.category.') !== 0) {
+    return FALSE;
+  }
+
+  list(, , $id) = explode('.', $name);
+  entity_delete_multiple('contact_category', array($id));
+  return TRUE;
+}
+
+/**
+ * Implements hook_entity_info().
+ */
+function contact_entity_info() {
+  $types['contact_category'] = array(
+    'label' => 'Category',
+    'controller class' => 'Drupal\config\ConfigStorageController',
+    'entity class' => 'Drupal\contact\Category',
+    'config prefix' => 'contact.category',
+    'entity keys' => array(
+      'id' => 'id',
+      'label' => 'label',
+      'uuid' => 'uuid',
+    ),
+  );
+  return $types;
+}
+
+/**
  * Loads a contact category.
  *
- * @param $cid
- *   The contact category ID.
+ * @param $id
+ *   The ID of the contact category to load.
  *
- * @return
- *   An array with the contact category's data.
+ * @return Drupal\contact\Category|false
+ *   A Category object or FALSE if the requested $id does not exist.
  */
-function contact_load($cid) {
-  return db_select('contact', 'c')
-    ->addTag('translatable')
-    ->fields('c')
-    ->condition('cid', $cid)
-    ->execute()
-    ->fetchAssoc();
+function contact_category_load($id) {
+  return entity_load('contact_category', $id);
 }
 
 /**
@@ -172,7 +237,7 @@ function contact_mail($key, &$message, $params) {
   $variables = array(
     '!site-name' => config('system.site')->get('name'),
     '!subject' => $params['subject'],
-    '!category' => isset($params['category']['category']) ? $params['category']['category'] : '',
+    '!category' => isset($params['category']) ? $params['category']->label() : '',
     '!form-url' => url(current_path(), array('absolute' => TRUE, 'language' => $language)),
     '!sender-name' => user_format_name($params['sender']),
     '!sender-url' => $params['sender']->uid ? url('user/' . $params['sender']->uid, array('absolute' => TRUE, 'language' => $language)) : $params['sender']->mail,
@@ -188,7 +253,7 @@ function contact_mail($key, &$message, $params) {
 
     case 'page_autoreply':
       $message['subject'] .= t('[!category] !subject', $variables, array('langcode' => $language->langcode));
-      $message['body'][] = $params['category']['reply'];
+      $message['body'][] = $params['category']->reply;
       break;
 
     case 'user_mail':
diff --git a/core/modules/contact/contact.pages.inc b/core/modules/contact/contact.pages.inc
index 92d73bc..0d2415f 100644
--- a/core/modules/contact/contact.pages.inc
+++ b/core/modules/contact/contact.pages.inc
@@ -12,7 +12,6 @@
  * Form constructor for the site-wide contact form.
  *
  * @see contact_menu()
- * @see contact_site_form_validate()
  * @see contact_site_form_submit()
  * @ingroup forms
  */
@@ -29,14 +28,7 @@ function contact_site_form($form, &$form_state) {
   }
 
   // Get an array of the categories and the current default category.
-  $categories = db_select('contact', 'c')
-    ->addTag('translatable')
-    ->fields('c', array('cid', 'category'))
-    ->orderBy('weight')
-    ->orderBy('category')
-    ->execute()
-    ->fetchAllKeyed();
-  $default_category = db_query("SELECT cid FROM {contact} WHERE selected = 1")->fetchField();
+  $categories = entity_load_multiple('contact_category');
 
   // If there are no categories, do not display the form.
   if (!$categories) {
@@ -48,15 +40,18 @@ function contact_site_form($form, &$form_state) {
     }
   }
 
+  // Prepare array for select options.
+  uasort($categories, 'Drupal\config\ConfigurableBase::sort');
+  $options = array();
+  foreach ($categories as $category) {
+    $options[$category->id()] = $category->label();
+  }
+
   // If there is more than one category available and no default category has
   // been selected, prepend a default placeholder value.
+  $default_category = $config->get('default_category');
   if (!$default_category) {
-    if (count($categories) > 1) {
-      $categories = array(0 => t('- Please choose -')) + $categories;
-    }
-    else {
-      $default_category = key($categories);
-    }
+    $default_category = !empty($categories) ? key($categories) : NULL;
   }
 
   if (!$user->uid) {
@@ -103,11 +98,12 @@ function contact_site_form($form, &$form_state) {
     '#maxlength' => 255,
     '#required' => TRUE,
   );
-  $form['cid'] = array(
+  $form['category'] = array(
     '#type' => 'select',
     '#title' => t('Category'),
     '#default_value' => $default_category,
-    '#options' => $categories,
+    '#options' => $options,
+    '#empty_value' => 0,
     '#required' => TRUE,
     '#access' => count($categories) > 1,
   );
@@ -133,17 +129,6 @@ function contact_site_form($form, &$form_state) {
 }
 
 /**
- * Form validation handler for contact_site_form().
- *
- * @see contact_site_form_submit()
- */
-function contact_site_form_validate($form, &$form_state) {
-  if (!$form_state['values']['cid']) {
-    form_set_error('cid', t('You must select a valid category.'));
-  }
-}
-
-/**
  * Form submission handler for contact_site_form().
  *
  * @see contact_site_form_validate()
@@ -156,7 +141,7 @@ function contact_site_form_submit($form, &$form_state) {
   $values['sender'] = $user;
   $values['sender']->name = $values['name'];
   $values['sender']->mail = $values['mail'];
-  $values['category'] = contact_load($values['cid']);
+  $values['category'] = contact_category_load($values['category']);
 
   // Save the anonymous user information to a cookie for reuse.
   if (!$user->uid) {
@@ -165,7 +150,7 @@ function contact_site_form_submit($form, &$form_state) {
   }
 
   // Get the to and from e-mail addresses.
-  $to = $values['category']['recipients'];
+  $to = implode(', ', $values['category']->recipients);
   $from = $values['sender']->mail;
 
   // Send the e-mail to the recipients using the site default language.
@@ -177,12 +162,12 @@ function contact_site_form_submit($form, &$form_state) {
   }
 
   // Send an auto-reply if necessary using the current language.
-  if ($values['category']['reply']) {
+  if ($values['category']->reply) {
     drupal_mail('contact', 'page_autoreply', $from, $language_interface, $values, $to);
   }
 
   flood_register_event('contact', config('contact.settings')->get('flood.interval'));
-  watchdog('mail', '%sender-name (@sender-from) sent an e-mail regarding %category.', array('%sender-name' => $values['name'], '@sender-from' => $from, '%category' => $values['category']['category']));
+  watchdog('mail', '%sender-name (@sender-from) sent an e-mail regarding %category.', array('%sender-name' => $values['name'], '@sender-from' => $from, '%category' => $values['category']->label()));
 
   // Jump to home page rather than back to contact page to avoid
   // contradictory messages if flood control has been activated.
diff --git a/core/modules/contact/lib/Drupal/contact/Category.php b/core/modules/contact/lib/Drupal/contact/Category.php
new file mode 100644
index 0000000..70d2742
--- /dev/null
+++ b/core/modules/contact/lib/Drupal/contact/Category.php
@@ -0,0 +1,59 @@
+<?php
+
+/**
+ * @file
+ * Definition of Drupal\contact\Category.
+ */
+
+namespace Drupal\contact;
+
+use Drupal\config\ConfigurableBase;
+
+/**
+ * Defines the contact category entity.
+ */
+class Category extends ConfigurableBase {
+
+  /**
+   * The category ID.
+   *
+   * @var string
+   */
+  public $id;
+
+  /**
+   * The category UUID.
+   *
+   * @var string
+   */
+  public $uuid;
+
+  /**
+   * The category label.
+   *
+   * @var string
+   */
+  public $label;
+
+  /**
+   * List of recipient e-mail addresses.
+   *
+   * @var array
+   */
+  public $recipients = array();
+
+  /**
+   * An auto-reply message to send to the message author.
+   *
+   * @var string
+   */
+  public $reply = '';
+
+  /**
+   * Weight of this category (used for sorting).
+   *
+   * @var int
+   */
+  public $weight = 0;
+
+}
diff --git a/core/modules/contact/lib/Drupal/contact/Tests/ContactSitewideTest.php b/core/modules/contact/lib/Drupal/contact/Tests/ContactSitewideTest.php
index 7eae709..dfb9d4b 100644
--- a/core/modules/contact/lib/Drupal/contact/Tests/ContactSitewideTest.php
+++ b/core/modules/contact/lib/Drupal/contact/Tests/ContactSitewideTest.php
@@ -66,32 +66,31 @@ function testSiteWideContact() {
     // Test invalid recipients.
     $invalid_recipients = array('invalid', 'invalid@', 'invalid@site.', '@site.', '@site.com');
     foreach ($invalid_recipients as $invalid_recipient) {
-      $this->addCategory($this->randomName(16), $invalid_recipient, '', FALSE);
+      $this->addCategory($this->randomName(16), $this->randomName(16), $invalid_recipient, '', FALSE);
       $this->assertRaw(t('%recipient is an invalid e-mail address.', array('%recipient' => $invalid_recipient)), t('Caught invalid recipient (' . $invalid_recipient . ').'));
     }
 
     // Test validation of empty category and recipients fields.
-    $this->addCategory($category = '', '', '', TRUE);
-    $this->assertText(t('Category field is required.'), t('Caught empty category field'));
+    $this->addCategory('', '', '', '', TRUE);
+    $this->assertText(t('Label field is required.'), t('Caught empty category field'));
     $this->assertText(t('Recipients field is required.'), t('Caught empty recipients field.'));
 
     // Create first valid category.
     $recipients = array('simpletest@example.com', 'simpletest2@example.com', 'simpletest3@example.com');
-    $this->addCategory($category = $this->randomName(16), implode(',', array($recipients[0])), '', TRUE);
-    $this->assertRaw(t('Category %category has been saved.', array('%category' => $category)), t('Category successfully saved.'));
+    $this->addCategory($id = drupal_strtolower($this->randomName(16)), $label = $this->randomName(16), implode(',', array($recipients[0])), '', TRUE);
+    $this->assertRaw(t('Category %label has been saved.', array('%label' => $label)), t('Category successfully saved.'));
 
     // Make sure the newly created category is included in the list of categories.
-    $this->assertNoUniqueText($category, t('New category included in categories list.'));
+    $this->assertNoUniqueText($label, t('New category included in categories list.'));
 
     // Test update contact form category.
-    $categories = $this->getCategories();
-    $category_id = $this->updateCategory($categories, $category = $this->randomName(16), $recipients_str = implode(',', array($recipients[0], $recipients[1])), $reply = $this->randomName(30), FALSE);
-    $category_array = db_query("SELECT category, recipients, reply, selected FROM {contact} WHERE cid = :cid", array(':cid' => $category_id))->fetchAssoc();
-    $this->assertEqual($category_array['category'], $category);
-    $this->assertEqual($category_array['recipients'], $recipients_str);
-    $this->assertEqual($category_array['reply'], $reply);
-    $this->assertFalse($category_array['selected']);
-    $this->assertRaw(t('Category %category has been saved.', array('%category' => $category)), t('Category successfully saved.'));
+    $this->updateCategory($id, $label = $this->randomName(16), $recipients_str = implode(',', array($recipients[0], $recipients[1])), $reply = $this->randomName(30), FALSE);
+    $config = config('contact.category.' . $id)->get();
+    $this->assertEqual($config['label'], $label);
+    $this->assertEqual($config['recipients'], array($recipients[0], $recipients[1]));
+    $this->assertEqual($config['reply'], $reply);
+    $this->assertNotEqual($id, config('contact.settings')->get('default_category'));
+    $this->assertRaw(t('Category %label has been saved.', array('%label' => $label)), t('Category successfully saved.'));
 
     // Ensure that the contact form is shown without a category selection input.
     user_role_grant_permissions(DRUPAL_ANONYMOUS_RID, array('access site-wide contact form'));
@@ -102,16 +101,16 @@ function testSiteWideContact() {
     $this->drupalLogin($admin_user);
 
     // Add more categories.
-    $this->addCategory($category = $this->randomName(16), implode(',', array($recipients[0], $recipients[1])), '', FALSE);
-    $this->assertRaw(t('Category %category has been saved.', array('%category' => $category)), t('Category successfully saved.'));
+    $this->addCategory(drupal_strtolower($this->randomName(16)), $label = $this->randomName(16), implode(',', array($recipients[0], $recipients[1])), '', FALSE);
+    $this->assertRaw(t('Category %label has been saved.', array('%label' => $label)), t('Category successfully saved.'));
 
-    $this->addCategory($category = $this->randomName(16), implode(',', array($recipients[0], $recipients[1], $recipients[2])), '', FALSE);
-    $this->assertRaw(t('Category %category has been saved.', array('%category' => $category)), t('Category successfully saved.'));
+    $this->addCategory($name = drupal_strtolower($this->randomName(16)), $label = $this->randomName(16), implode(',', array($recipients[0], $recipients[1], $recipients[2])), '', FALSE);
+    $this->assertRaw(t('Category %label has been saved.', array('%label' => $label)), t('Category successfully saved.'));
 
     // Try adding a category that already exists.
-    $this->addCategory($category, '', '', FALSE);
-    $this->assertNoRaw(t('Category %category has been saved.', array('%category' => $category)), t('Category not saved.'));
-    $this->assertRaw(t('A contact form with category %category already exists.', array('%category' => $category)), t('Duplicate category error found.'));
+    $this->addCategory($name, $label, '', '', FALSE);
+    $this->assertNoRaw(t('Category %label has been saved.', array('%label' => $label)), t('Category not saved.'));
+    $this->assertRaw(t('The machine-readable name is already in use. It must be unique.'), t('Duplicate category error found.'));
 
     // Clear flood table in preparation for flood test and allow other checks to complete.
     db_delete('flood')->execute();
@@ -130,36 +129,39 @@ function testSiteWideContact() {
     $this->assertResponse(200, t('Access granted to anonymous user with permission.'));
 
     // Submit contact form with invalid values.
-    $this->submitContact('', $recipients[0], $this->randomName(16), $categories[0], $this->randomName(64));
+    $categories = entity_load_multiple('contact_category');
+    $id = key($categories);
+
+    $this->submitContact('', $recipients[0], $this->randomName(16), $id, $this->randomName(64));
     $this->assertText(t('Your name field is required.'), t('Name required.'));
 
-    $this->submitContact($this->randomName(16), '', $this->randomName(16), $categories[0], $this->randomName(64));
+    $this->submitContact($this->randomName(16), '', $this->randomName(16), $id, $this->randomName(64));
     $this->assertText(t('Your e-mail address field is required.'), t('E-mail required.'));
 
-    $this->submitContact($this->randomName(16), $invalid_recipients[0], $this->randomName(16), $categories[0], $this->randomName(64));
+    $this->submitContact($this->randomName(16), $invalid_recipients[0], $this->randomName(16), $id, $this->randomName(64));
     $this->assertRaw(t('The e-mail address %mail is not valid.', array('%mail' => 'invalid')), 'Valid e-mail required.');
 
-    $this->submitContact($this->randomName(16), $recipients[0], '', $categories[0], $this->randomName(64));
+    $this->submitContact($this->randomName(16), $recipients[0], '', $id, $this->randomName(64));
     $this->assertText(t('Subject field is required.'), t('Subject required.'));
 
-    $this->submitContact($this->randomName(16), $recipients[0], $this->randomName(16), $categories[0], '');
+    $this->submitContact($this->randomName(16), $recipients[0], $this->randomName(16), $id, '');
     $this->assertText(t('Message field is required.'), t('Message required.'));
 
     // Test contact form with no default category selected.
-    db_update('contact')
-      ->fields(array('selected' => 0))
-      ->execute();
+    config('contact.settings')
+      ->set('default_category', '')
+      ->save();
     $this->drupalGet('contact');
-    $this->assertRaw(t('- Please choose -'), t('Without selected categories the visitor is asked to chose a category.'));
+    $this->assertRaw(t('- Select -'), t('Without selected categories the visitor is asked to chose a category.'));
 
     // Submit contact form with invalid category id (cid 0).
     $this->submitContact($this->randomName(16), $recipients[0], $this->randomName(16), 0, '');
-    $this->assertText(t('You must select a valid category.'), t('Valid category required.'));
+    $this->assertText('Category field is required.');
 
     // Submit contact form with correct values and check flood interval.
     for ($i = 0; $i < $flood_limit; $i++) {
-      $this->submitContact($this->randomName(16), $recipients[0], $this->randomName(16), $categories[0], $this->randomName(64));
-      $this->assertText(t('Your message has been sent.'), t('Message sent.'));
+      $this->submitContact($this->randomName(16), $recipients[0], $this->randomName(16), $id, $this->randomName(64));
+      $this->assertText(t('Your message has been sent.'));
     }
     // Submit contact form one over limit.
     $this->drupalGet('contact');
@@ -182,9 +184,9 @@ function testAutoReply() {
     // Set up three categories, 2 with an auto-reply and one without.
     $foo_autoreply = $this->randomName(40);
     $bar_autoreply = $this->randomName(40);
-    $this->addCategory('foo', 'foo@example.com', $foo_autoreply, FALSE);
-    $this->addCategory('bar', 'bar@example.com', $bar_autoreply, FALSE);
-    $this->addCategory('no_autoreply', 'bar@example.com', '', FALSE);
+    $this->addCategory('foo', 'foo', 'foo@example.com', $foo_autoreply, FALSE);
+    $this->addCategory('bar', 'bar', 'bar@example.com', $bar_autoreply, FALSE);
+    $this->addCategory('no_autoreply', 'no_autoreply', 'bar@example.com', '', FALSE);
 
     // Log the current user out in order to test the name and e-mail fields.
     $this->drupalLogout();
@@ -193,34 +195,36 @@ function testAutoReply() {
     // Test the auto-reply for category 'foo'.
     $email = $this->randomName(32) . '@example.com';
     $subject = $this->randomName(64);
-    $this->submitContact($this->randomName(16), $email, $subject, 2, $this->randomString(128));
+    $this->submitContact($this->randomName(16), $email, $subject, 'foo', $this->randomString(128));
 
     // We are testing the auto-reply, so there should be one e-mail going to the sender.
     $captured_emails = $this->drupalGetMails(array('id' => 'contact_page_autoreply', 'to' => $email, 'from' => 'foo@example.com'));
-    $this->assertEqual(count($captured_emails), 1, t('Auto-reply e-mail was sent to the sender for category "foo".'), t('Contact'));
-    $this->assertEqual($captured_emails[0]['body'], drupal_html_to_text($foo_autoreply), t('Auto-reply e-mail body is correct for category "foo".'), t('Contact'));
+    $this->assertEqual(count($captured_emails), 1);
+    $this->assertEqual($captured_emails[0]['body'], drupal_html_to_text($foo_autoreply));
 
     // Test the auto-reply for category 'bar'.
     $email = $this->randomName(32) . '@example.com';
-    $this->submitContact($this->randomName(16), $email, $this->randomString(64), 3, $this->randomString(128));
+    $this->submitContact($this->randomName(16), $email, $this->randomString(64), 'bar', $this->randomString(128));
 
     // Auto-reply for category 'bar' should result in one auto-reply e-mail to the sender.
     $captured_emails = $this->drupalGetMails(array('id' => 'contact_page_autoreply', 'to' => $email, 'from' => 'bar@example.com'));
-    $this->assertEqual(count($captured_emails), 1, t('Auto-reply e-mail was sent to the sender for category "bar".'), t('Contact'));
-    $this->assertEqual($captured_emails[0]['body'], drupal_html_to_text($bar_autoreply), t('Auto-reply e-mail body is correct for category "bar".'), t('Contact'));
+    $this->assertEqual(count($captured_emails), 1);
+    $this->assertEqual($captured_emails[0]['body'], drupal_html_to_text($bar_autoreply));
 
     // Verify that no auto-reply is sent when the auto-reply field is left blank.
     $email = $this->randomName(32) . '@example.com';
-    $this->submitContact($this->randomName(16), $email, $this->randomString(64), 4, $this->randomString(128));
+    $this->submitContact($this->randomName(16), $email, $this->randomString(64), 'no_autoreply', $this->randomString(128));
     $captured_emails = $this->drupalGetMails(array('id' => 'contact_page_autoreply', 'to' => $email, 'from' => 'no_autoreply@example.com'));
-    $this->assertEqual(count($captured_emails), 0, t('No auto-reply e-mail was sent to the sender for category "no-autoreply".'), t('Contact'));
+    $this->assertEqual(count($captured_emails), 0);
   }
 
   /**
    * Adds a category.
    *
-   * @param string $category
-   *   The category name.
+   * @param string $id
+   *   The category machine name.
+   * @param string $label
+   *   The category label.
    * @param string $recipients
    *   The list of recipient e-mail addresses.
    * @param string $reply
@@ -229,9 +233,10 @@ function testAutoReply() {
    * @param boolean $selected
    *   Boolean indicating whether the category should be selected by default.
    */
-  function addCategory($category, $recipients, $reply, $selected) {
+  function addCategory($id, $label, $recipients, $reply, $selected) {
     $edit = array();
-    $edit['category'] = $category;
+    $edit['label'] = $label;
+    $edit['id'] = $id;
     $edit['recipients'] = $recipients;
     $edit['reply'] = $reply;
     $edit['selected'] = ($selected ? TRUE : FALSE);
@@ -241,8 +246,10 @@ function addCategory($category, $recipients, $reply, $selected) {
   /**
    * Updates a category.
    *
-   * @param string $category
-   *   The category name.
+   * @param string $id
+   *   The category machine name.
+   * @param string $label
+   *   The category label.
    * @param string $recipients
    *   The list of recipient e-mail addresses.
    * @param string $reply
@@ -251,15 +258,13 @@ function addCategory($category, $recipients, $reply, $selected) {
    * @param boolean $selected
    *   Boolean indicating whether the category should be selected by default.
    */
-  function updateCategory($categories, $category, $recipients, $reply, $selected) {
-    $category_id = $categories[array_rand($categories)];
+  function updateCategory($id, $label, $recipients, $reply, $selected) {
     $edit = array();
-    $edit['category'] = $category;
+    $edit['label'] = $label;
     $edit['recipients'] = $recipients;
     $edit['reply'] = $reply;
     $edit['selected'] = ($selected ? TRUE : FALSE);
-    $this->drupalPost('admin/structure/contact/edit/' . $category_id, $edit, t('Save'));
-    return ($category_id);
+    $this->drupalPost('admin/structure/contact/manage/' . $id, $edit, t('Save'));
   }
 
   /**
@@ -271,17 +276,17 @@ function updateCategory($categories, $category, $recipients, $reply, $selected)
    *   The e-mail address of the sender.
    * @param string $subject
    *   The subject of the message.
-   * @param integer $cid
+   * @param string $id
    *   The category ID of the message.
    * @param string $message
    *   The message body.
    */
-  function submitContact($name, $mail, $subject, $cid, $message) {
+  function submitContact($name, $mail, $subject, $id, $message) {
     $edit = array();
     $edit['name'] = $name;
     $edit['mail'] = $mail;
     $edit['subject'] = $subject;
-    $edit['cid'] = $cid;
+    $edit['category'] = $id;
     $edit['message'] = $message;
     $this->drupalPost('contact', $edit, t('Send message'));
   }
@@ -290,22 +295,11 @@ function submitContact($name, $mail, $subject, $cid, $message) {
    * Deletes all categories.
    */
   function deleteCategories() {
-    $categories = $this->getCategories();
-    foreach ($categories as $category) {
-      $category_name = db_query("SELECT category FROM {contact} WHERE cid = :cid", array(':cid' => $category))->fetchField();
-      $this->drupalPost('admin/structure/contact/delete/' . $category, array(), t('Delete'));
-      $this->assertRaw(t('Category %category has been deleted.', array('%category' => $category_name)), t('Category deleted successfully.'));
+    $categories = entity_load_multiple('contact_category');
+    foreach ($categories as $id => $category) {
+      $this->drupalPost('admin/structure/contact/manage/' . $id . '/delete', array(), t('Delete'));
+      $this->assertRaw(t('Category %label has been deleted.', array('%label' => $category->label())), t('Category deleted successfully.'));
     }
   }
 
-  /**
-   * Gets a list of all category IDs.
-   *
-   * @return array
-   *   A list of the category IDs.
-   */
-  function getCategories() {
-    $categories = db_query('SELECT cid FROM {contact}')->fetchCol();
-    return $categories;
-  }
 }
diff --git a/core/modules/system/lib/Drupal/system/Tests/Module/ModuleApiTest.php b/core/modules/system/lib/Drupal/system/Tests/Module/ModuleApiTest.php
index 8468185..8177165 100644
--- a/core/modules/system/lib/Drupal/system/Tests/Module/ModuleApiTest.php
+++ b/core/modules/system/lib/Drupal/system/Tests/Module/ModuleApiTest.php
@@ -45,6 +45,8 @@ function testModuleList() {
     // Try to install a new module.
     module_enable(array('contact'));
     $module_list[] = 'contact';
+    // Contact module requires config.
+    $module_list[] = 'config';
     sort($module_list);
     $this->assertModuleList($module_list, t('After adding a module'));