diff --git a/config/schema/address.schema.yml b/config/schema/address.schema.yml
index e706c72..a9643b8 100644
--- a/config/schema/address.schema.yml
+++ b/config/schema/address.schema.yml
@@ -151,6 +151,11 @@ field.widget.settings.address_default:
     wrapper_type:
       type: string
       label: Wrapper type
+    preferred_countries:
+      type: sequence
+      label: 'Preferred countries'
+      sequence:
+        type: string
 
 field.widget.settings.address_zone_default:
   type: mapping
@@ -183,6 +188,12 @@ views.field.subdivision:
 views.filter.country:
   type: views.filter.in_operator
   label: 'Country'
+  mapping:
+    preferred_countries:
+      type: sequence
+      label: 'Preferred countries'
+      sequence:
+        type: string
 
 views.filter.country_code:
   type: views.filter.country
diff --git a/src/Element/Address.php b/src/Element/Address.php
index a928eeb..9922933 100644
--- a/src/Element/Address.php
+++ b/src/Element/Address.php
@@ -44,6 +44,7 @@ use Drupal\Core\Render\Element\FormElement;
  *     AddressField::POSTAL_CODE => FieldOverride::OPTIONAL,
  *   ],
  *   '#available_countries' => ['DE', 'FR'],
+ *   '#preferred_countries' => ['DE'],
  * ];
  * @endcode
  *
@@ -61,6 +62,8 @@ class Address extends FormElement {
       '#available_countries' => [],
       // FieldOverride constants keyed by AddressField constants.
       '#field_overrides' => [],
+      // List of country codes. Listed countries will be at the top of select.
+      '#preferred_countries' => [],
 
       '#input' => TRUE,
       '#multiple' => FALSE,
@@ -178,6 +181,7 @@ class Address extends FormElement {
       '#type' => 'address_country',
       '#title' => t('Country'),
       '#available_countries' => $element['#available_countries'],
+      '#preferred_countries' => $element['#preferred_countries'],
       '#default_value' => $element['#default_value']['country_code'],
       '#required' => $element['#required'],
       '#limit_validation_errors' => [],
diff --git a/src/Element/Country.php b/src/Element/Country.php
index 6fda484..3f76220 100644
--- a/src/Element/Country.php
+++ b/src/Element/Country.php
@@ -2,6 +2,7 @@
 
 namespace Drupal\address\Element;
 
+use Drupal\address\PreferredCountriesTrait;
 use Drupal\Core\Form\FormStateInterface;
 use Drupal\Core\Render\Element\FormElement;
 
@@ -14,6 +15,7 @@ use Drupal\Core\Render\Element\FormElement;
  *   '#type' => 'address_country',
  *   '#default_value' => 'DE',
  *   '#available_countries' => ['DE', 'FR'],
+ *   '#preferred_countries' => ['DE'],
  * ];
  * @endcode
  *
@@ -21,6 +23,8 @@ use Drupal\Core\Render\Element\FormElement;
  */
 class Country extends FormElement {
 
+  use PreferredCountriesTrait;
+
   /**
    * {@inheritdoc}
    */
@@ -29,6 +33,8 @@ class Country extends FormElement {
     return [
       // List of country codes. If empty, all countries will be available.
       '#available_countries' => [],
+      // List of country codes. Listed countries will be at the top of select.
+      '#preferred_countries' => [],
 
       '#input' => TRUE,
       '#multiple' => FALSE,
@@ -80,6 +86,14 @@ class Country extends FormElement {
     }
 
     $element['#tree'] = TRUE;
+
+    // Rebuild country options if any preferred countries have been selected.
+    $preferred_countries = $element['#preferred_countries'] ?? [];
+    $preferred_countries = array_combine($preferred_countries, $preferred_countries);
+    $country_options = empty($preferred_countries)
+      ? $country_list
+      : self::rebuildCountryList($country_list, $preferred_countries);
+
     // Hide the dropdown when there is only one possible value.
     if (count($country_list) == 1 && $element['#required']) {
       $element['country_code'] = [
@@ -93,7 +107,7 @@ class Country extends FormElement {
         '#title' => $element['#title'],
         '#title_display' => $element['#title_display'],
         '#description_display' => $element['#description_display'],
-        '#options' => $country_list,
+        '#options' => $country_options,
         '#default_value' => $element['#default_value'],
         '#required' => $element['#required'],
         '#limit_validation_errors' => [],
diff --git a/src/Plugin/Field/FieldWidget/AddressDefaultWidget.php b/src/Plugin/Field/FieldWidget/AddressDefaultWidget.php
index 7cc303d..dfe2149 100644
--- a/src/Plugin/Field/FieldWidget/AddressDefaultWidget.php
+++ b/src/Plugin/Field/FieldWidget/AddressDefaultWidget.php
@@ -94,11 +94,12 @@ class AddressDefaultWidget extends WidgetBase implements ContainerFactoryPluginI
     );
   }
 
-  /**
+   /**
    * {@inheritdoc}
    */
   public static function defaultSettings() {
     return [
+      'preferred_countries' => [],
       'wrapper_type' => 'fieldset',
     ] + parent::defaultSettings();
   }
@@ -107,14 +108,32 @@ class AddressDefaultWidget extends WidgetBase implements ContainerFactoryPluginI
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
-    return [
-      'wrapper_type' => [
-        '#type' => 'radios',
-        '#title' => $this->t('Wrapper type'),
-        '#options' => $this->wrapperTypeOptions(),
-        '#default_value' => $this->getSetting('wrapper_type'),
-      ],
+    $element = [];
+
+    $country_list = $this->countryRepository->getList();
+    $available_countries = $this->getFieldSetting('available_countries');
+    if (!empty($available_countries)) {
+      $country_list = array_intersect_key($country_list, $available_countries);
+    }
+
+    $element['preferred_countries'] = [
+      '#type' => 'select',
+      '#title' => $this->t('Preferred countries'),
+      '#options' => $country_list,
+      '#default_value' => $this->getSetting('preferred_countries'),
+      '#empty_value' => '',
+      '#multiple' => TRUE,
+      '#size' => 10,
+    ];
+
+    $element['wrapper_type'] = [
+      '#type' => 'radios',
+      '#title' => $this->t('Wrapper type'),
+      '#options' => $this->wrapperTypeOptions(),
+      '#default_value' => $this->getSetting('wrapper_type'),
     ];
+
+    return $element;
   }
 
   /**
@@ -122,9 +141,26 @@ class AddressDefaultWidget extends WidgetBase implements ContainerFactoryPluginI
    */
   public function settingsSummary() {
     $summary = parent::settingsSummary();
+
+    // Add summary for preferred countries setting.
+    $preferred_countries = $this->getSetting('preferred_countries');
+    if (!empty($preferred_countries)) {
+        $country_list = $this->countryRepository->getList();
+        foreach ($preferred_countries as &$preferred_country) {
+            $preferred_country = $country_list[$preferred_country];
+        }
+        $summary[] = $this->formatPlural(count($preferred_countries),
+            'Preferred country: @countries',
+            'Preferred countries: @countries',
+            ['@countries' => implode(', ', $preferred_countries)]
+        );
+    }
+
+    // Add summary for wrapper type setting.
     $summary[] = $this->t('Wrapper type: @wrapper_type', [
       '@wrapper_type' => $this->wrapperTypeOptions()[$this->getSetting('wrapper_type')],
     ]);
+
     return $summary;
   }
 
@@ -170,6 +206,7 @@ class AddressDefaultWidget extends WidgetBase implements ContainerFactoryPluginI
       '#required' => $required,
       '#available_countries' => $item->getAvailableCountries(),
       '#field_overrides' => $item->getFieldOverrides(),
+      '#preferred_countries' => $this->getSetting('preferred_countries'),
     ];
     // Make sure no properties are required on the default value widget.
     if ($this->isDefaultValueWidget($form_state)) {
diff --git a/src/Plugin/Field/FieldWidget/CountryDefaultWidget.php b/src/Plugin/Field/FieldWidget/CountryDefaultWidget.php
index 6a2b1e3..ff0152f 100644
--- a/src/Plugin/Field/FieldWidget/CountryDefaultWidget.php
+++ b/src/Plugin/Field/FieldWidget/CountryDefaultWidget.php
@@ -68,6 +68,65 @@ class CountryDefaultWidget extends WidgetBase implements ContainerFactoryPluginI
     );
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public static function defaultSettings() {
+    return [
+      'preferred_countries' => [],
+    ] + parent::defaultSettings();
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function settingsForm(array $form, FormStateInterface $form_state) {
+    $element = [];
+
+    $country_list = $this->countryRepository->getList();
+    $available_countries = $this->getFieldSetting('available_countries');
+    if (!empty($available_countries)) {
+      $country_list = array_intersect_key($country_list, $available_countries);
+    }
+
+    $element['preferred_countries'] = [
+      '#type' => 'select',
+      '#title' => $this->t('Preferred countries'),
+      '#options' => $country_list,
+      '#default_value' => $this->getSetting('preferred_countries'),
+      '#empty_value' => '',
+      '#multiple' => TRUE,
+      '#size' => 10,
+    ];
+
+    return $element;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function settingsSummary() {
+    $summary = [];
+
+    // Display summary for preferred countries setting.
+    $preferred_countries = $this->getSetting('preferred_countries');
+    if (!empty($preferred_countries)) {
+      if (!isset($country_list)) {
+        $country_list = $this->countryRepository->getList();
+      }
+      foreach ($preferred_countries as &$preferred_country) {
+        $preferred_country = $country_list[$preferred_country];
+      }
+      $summary['preferred_countries'] = $this->formatPlural(count($preferred_countries),
+        'Preferred country: @countries',
+        'Preferred countries: @countries',
+        ['@countries' => implode(', ', $preferred_countries)]
+      );
+    }
+
+    return $summary;
+  }
+
   /**
    * {@inheritdoc}
    */
@@ -76,6 +135,7 @@ class CountryDefaultWidget extends WidgetBase implements ContainerFactoryPluginI
       '#type' => 'address_country',
       '#default_value' => $items[$delta]->value,
       '#available_countries' => $items[$delta]->getAvailableCountries(),
+      '#preferred_countries' => $this->getSetting('preferred_countries'),
     ] + $element;
 
     return $element;
diff --git a/src/Plugin/views/filter/Country.php b/src/Plugin/views/filter/Country.php
index 2462f97..13f0f7d 100644
--- a/src/Plugin/views/filter/Country.php
+++ b/src/Plugin/views/filter/Country.php
@@ -2,6 +2,9 @@
 
 namespace Drupal\address\Plugin\views\filter;
 
+use Drupal\address\PreferredCountriesTrait;
+use Drupal\Core\Form\FormStateInterface;
+
 /**
  * Filter by country.
  *
@@ -11,6 +14,8 @@ namespace Drupal\address\Plugin\views\filter;
  */
 class Country extends CountryAwareInOperatorBase {
 
+  use PreferredCountriesTrait;
+
   /**
    * {@inheritdoc}
    */
@@ -22,4 +27,50 @@ class Country extends CountryAwareInOperatorBase {
     return $this->valueOptions;
   }
 
+  /**
+   * {@inheritdoc}
+   */
+  public function buildExposedForm(&$form, FormStateInterface $form_state) {
+    parent::buildExposedForm($form, $form_state);
+
+    // We're implementing preferred_countries and the optgroup support only here
+    // in the exposed filter select, so as not to break the admin UI default
+    // value form's checkboxes, which don't handle nested arrays properly.
+    $preferred_countries = $this->options['preferred_countries'];
+    if (!empty($preferred_countries)) {
+      $form_key = $this->options['expose']['identifier'];
+      $form[$form_key]['#options'] = self::rebuildCountryList($form[$form_key]['#options'], $preferred_countries);
+    }
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  protected function defineOptions() {
+    $options = parent::defineOptions();
+    $options['preferred_countries'] = ['default' => []];
+    return $options;
+  }
+
+  /**
+   * {@inheritdoc}
+   */
+  public function buildOptionsForm(&$form, FormStateInterface $form_state) {
+    parent::buildOptionsForm($form, $form_state);
+    $form['preferred_countries'] = [
+      '#type' => 'select',
+      '#title' => $this->t('Preferred countries'),
+      '#options' => $this->getAvailableCountries(),
+      '#multiple' => TRUE,
+      '#default_value' => $this->options['preferred_countries'],
+      '#states' => [
+        'visible' => [
+          ':input[name="options[expose_button][checkbox][checkbox]"]' => [
+            'checked' => TRUE,
+          ],
+        ],
+      ],
+    ];
+  }
+
 }