diff --git a/projects/plugins/jetpack/_inc/client/newsletter/subscriptions-settings.jsx b/projects/plugins/jetpack/_inc/client/newsletter/subscriptions-settings.jsx
index 3697b42c0a8de..d45bf9f4d084a 100644
--- a/projects/plugins/jetpack/_inc/client/newsletter/subscriptions-settings.jsx
+++ b/projects/plugins/jetpack/_inc/client/newsletter/subscriptions-settings.jsx
@@ -46,6 +46,8 @@ function SubscriptionsSettings( props ) {
 		isStcEnabled,
 		isSmEnabled,
 		isSubscribePostEndEnabled,
+		isLoginNavigationEnabled,
+		isSubscriptionSiteFeatureEnabled,
 		isSubscriptionSiteEditSupported,
 		isSubscriptionsActive,
 		siteRawUrl,
@@ -74,6 +76,13 @@ function SubscriptionsSettings( props ) {
 		  } )
 		: null;
 
+	const headerTemplateEditorUrl = siteAdminUrl
+		? addQueryArgs( `${ siteAdminUrl }site-editor.php`, {
+				postType: 'wp_template_part',
+				postId: `${ themeStylesheet }//header`,
+		  } )
+		: null;
+
 	const handleSubscribeToBlogToggleChange = useCallback( () => {
 		updateFormStateModuleOption( SUBSCRIPTIONS_MODULE_NAME, 'stb_enabled' );
 	}, [ updateFormStateModuleOption ] );
@@ -93,6 +102,13 @@ function SubscriptionsSettings( props ) {
 		);
 	}, [ updateFormStateModuleOption ] );
 
+	const handleLoginNavigationToggleChange = useCallback( () => {
+		updateFormStateModuleOption(
+			SUBSCRIPTIONS_MODULE_NAME,
+			'jetpack_subscriptions_login_navigation_enabled'
+		);
+	}, [ updateFormStateModuleOption ] );
+
 	const getSubClickableCard = () => {
 		if ( unavailableInOfflineMode || ! isSubscriptionsActive || ! isLinked ) {
 			return '';
@@ -231,6 +247,29 @@ function SubscriptionsSettings( props ) {
 									'jetpack'
 								) }
 							/>
+							{ isSubscriptionSiteFeatureEnabled && (
+								<ToggleControl
+									checked={ isSubscriptionsActive && isLoginNavigationEnabled }
+									disabled={ isDisabled }
+									toggling={ isSavingAnyOption( [
+										'jetpack_subscriptions_login_navigation_enabled',
+									] ) }
+									onChange={ handleLoginNavigationToggleChange }
+									label={
+										<>
+											{ __( 'Add the Subscriber Login Block to the navigation', 'jetpack' ) }
+											{ isBlockTheme && headerTemplateEditorUrl && (
+												<>
+													{ '. ' }
+													<ExternalLink href={ headerTemplateEditorUrl }>
+														{ __( 'Preview and edit', 'jetpack' ) }
+													</ExternalLink>
+												</>
+											) }
+										</>
+									}
+								/>
+							) }
 						</FormFieldset>
 					}
 				</SettingsGroup>
@@ -264,6 +303,9 @@ export default withModuleSettingsFormHelpers(
 			isSubscribePostEndEnabled: ownProps.getOptionValue(
 				'jetpack_subscriptions_subscribe_post_end_enabled'
 			),
+			isLoginNavigationEnabled: ownProps.getOptionValue(
+				'jetpack_subscriptions_login_navigation_enabled'
+			),
 			isSubscriptionSiteFeatureEnabled: isSubscriptionSiteEnabled( state ),
 			isSubscriptionSiteEditSupported: subscriptionSiteEditSupported( state ),
 			isBlockTheme: currentThemeIsBlockTheme( state ),
diff --git a/projects/plugins/jetpack/_inc/lib/class.core-rest-api-endpoints.php b/projects/plugins/jetpack/_inc/lib/class.core-rest-api-endpoints.php
index 1ea218fcb25dc..cb104c91c4dda 100644
--- a/projects/plugins/jetpack/_inc/lib/class.core-rest-api-endpoints.php
+++ b/projects/plugins/jetpack/_inc/lib/class.core-rest-api-endpoints.php
@@ -2659,6 +2659,13 @@ public static function get_updateable_data_list( $selector = '' ) {
 				'validate_callback' => __CLASS__ . '::validate_boolean',
 				'jp_group'          => 'subscriptions',
 			),
+			'jetpack_subscriptions_login_navigation_enabled' => array(
+				'description'       => esc_html__( 'Add Subscriber Login block to the navigation.', 'jetpack' ),
+				'type'              => 'boolean',
+				'default'           => 0,
+				'validate_callback' => __CLASS__ . '::validate_boolean',
+				'jp_group'          => 'subscriptions',
+			),
 			'social_notifications_subscribe'        => array(
 				'description'       => esc_html__( 'Send email notification when someone subscribes to my blog', 'jetpack' ),
 				'type'              => 'boolean',
diff --git a/projects/plugins/jetpack/_inc/lib/core-api/class.jetpack-core-api-module-endpoints.php b/projects/plugins/jetpack/_inc/lib/core-api/class.jetpack-core-api-module-endpoints.php
index 435d407e6bd4e..4361110b6429b 100644
--- a/projects/plugins/jetpack/_inc/lib/core-api/class.jetpack-core-api-module-endpoints.php
+++ b/projects/plugins/jetpack/_inc/lib/core-api/class.jetpack-core-api-module-endpoints.php
@@ -987,6 +987,7 @@ public function update_data( $request ) {
 				case 'wpcom_featured_image_in_email':
 				case 'wpcom_subscription_emails_use_excerpt':
 				case 'jetpack_subscriptions_subscribe_post_end_enabled':
+				case 'jetpack_subscriptions_login_navigation_enabled':
 					// Convert the false value to 0. This allows the option to be updated if it doesn't exist yet.
 					$sub_value = $value ? $value : 0;
 					$updated   = (string) get_option( $option ) !== (string) $sub_value ? update_option( $option, $sub_value ) : true;
diff --git a/projects/plugins/jetpack/changelog/update-subscription-site-login-navigation b/projects/plugins/jetpack/changelog/update-subscription-site-login-navigation
new file mode 100644
index 0000000000000..9e71355559483
--- /dev/null
+++ b/projects/plugins/jetpack/changelog/update-subscription-site-login-navigation
@@ -0,0 +1,4 @@
+Significance: minor
+Type: other
+
+Subscription Site: Hook Subscriber Login block into the navigation
diff --git a/projects/plugins/jetpack/extensions/blocks/subscriber-login/class-jetpack-subscription-site.php b/projects/plugins/jetpack/extensions/blocks/subscriber-login/class-jetpack-subscription-site.php
new file mode 100644
index 0000000000000..ddb16ee16c35b
--- /dev/null
+++ b/projects/plugins/jetpack/extensions/blocks/subscriber-login/class-jetpack-subscription-site.php
@@ -0,0 +1,84 @@
+<?php
+/**
+ * Adds support for Jetpack Subscription Site feature.
+ *
+ * @package automattic/jetpack
+ * @since $$next_version$$
+ */
+
+namespace Automattic\Jetpack\Extensions\Subscriber_Login;
+
+/**
+ * Jetpack_Subscription_Site class.
+ */
+class Jetpack_Subscription_Site {
+	/**
+	 * Jetpack_Subscription_Site singleton instance.
+	 *
+	 * @var Jetpack_Subscription_Site|null
+	 */
+	private static $instance;
+
+	/**
+	 * Jetpack_Subscription_Site instance init.
+	 */
+	public static function init() {
+		if ( self::$instance === null ) {
+			self::$instance = new Jetpack_Subscription_Site();
+		}
+
+		return self::$instance;
+	}
+
+	/**
+	 * Handles Subscriber Login block placements.
+	 *
+	 * @return void
+	 */
+	public function handle_subscriber_login_block_placements() {
+		if ( ! $this->is_subscription_site_feature_enabled() ) {
+			return;
+		}
+
+		$this->handle_subscriber_login_block_navigation_placement();
+	}
+
+	/**
+	 * Returns true if Subscription Site feature is enabled.
+	 *
+	 * @return bool
+	 */
+	protected function is_subscription_site_feature_enabled() {
+		// It's temporary. Allows to enable the Subscription Site feature.
+		return (bool) apply_filters( 'jetpack_subscription_site_enabled', false );
+	}
+
+	/**
+	 * Handles Subscriber Login block navigation placement.
+	 *
+	 * @return void
+	 */
+	protected function handle_subscriber_login_block_navigation_placement() {
+		$subscriber_login_navigation_enabled = get_option( 'jetpack_subscriptions_login_navigation_enabled', false );
+		if ( ! $subscriber_login_navigation_enabled ) {
+			return;
+		}
+
+		if ( ! wp_is_block_theme() ) { // TODO Fallback for classic themes.
+			return;
+		}
+
+		add_filter(
+			'hooked_block_types',
+			function ( $hooked_blocks, $relative_position, $anchor_block ) {
+				if ( $anchor_block === 'core/navigation' && $relative_position === 'last_child' ) {
+					$hooked_blocks[] = 'jetpack/subscriber-login';
+				}
+
+				return $hooked_blocks;
+			},
+			10,
+			3
+		);
+	}
+}
diff --git a/projects/plugins/jetpack/extensions/blocks/subscriber-login/subscriber-login.php b/projects/plugins/jetpack/extensions/blocks/subscriber-login/subscriber-login.php
index fa75f2b431aaf..99869f726e65f 100644
--- a/projects/plugins/jetpack/extensions/blocks/subscriber-login/subscriber-login.php
+++ b/projects/plugins/jetpack/extensions/blocks/subscriber-login/subscriber-login.php
@@ -17,6 +17,8 @@
 use Jetpack_Memberships;
 use Jetpack_Options;
 
+require_once __DIR__ . '/class-jetpack-subscription-site.php';
+
 /**
  * Registers the block for use in Gutenberg
  * This is done via an action so that we can disable
@@ -35,6 +37,8 @@ function register_block() {
 		__DIR__,
 		array( 'render_callback' => __NAMESPACE__ . '\render_block' )
 	);
+
+	Jetpack_Subscription_Site::init()->handle_subscriber_login_block_placements();
 }
 add_action( 'init', __NAMESPACE__ . '\register_block' );