diff --git src/wp-includes/class-wp-admin-bar.php src/wp-includes/class-wp-admin-bar.php
index 69021f527b..69236ff267 100644
--- src/wp-includes/class-wp-admin-bar.php
+++ src/wp-includes/class-wp-admin-bar.php
@@ -55,6 +55,8 @@ class WP_Admin_Bar {
 
 		add_action( 'admin_head', 'wp_admin_bar_header' );
 
+		add_action( 'login_head', 'wp_admin_bar_header' );
+
 		if ( current_theme_supports( 'admin-bar' ) ) {
 			/**
 			 * To remove the default padding styles from WordPress for the Toolbar, use the following code:
@@ -69,6 +71,7 @@ class WP_Admin_Bar {
 		}
 
 		add_action( 'wp_head', $header_callback );
+		add_action( 'login_head', $header_callback, 1000 );
 
 		wp_enqueue_script( 'admin-bar' );
 		wp_enqueue_style( 'admin-bar' );
diff --git src/wp-includes/default-filters.php src/wp-includes/default-filters.php
index 26cdfeba20..1ff9979f95 100644
--- src/wp-includes/default-filters.php
+++ src/wp-includes/default-filters.php
@@ -535,8 +535,10 @@ add_action( 'template_redirect', '_wp_admin_bar_init', 0 );
 add_action( 'admin_init', '_wp_admin_bar_init' );
 add_action( 'before_signup_header', '_wp_admin_bar_init' );
 add_action( 'activate_header', '_wp_admin_bar_init' );
+add_action( 'login_head', '_wp_admin_bar_init' );
 add_action( 'wp_footer', 'wp_admin_bar_render', 1000 );
 add_action( 'in_admin_header', 'wp_admin_bar_render', 0 );
+add_action( 'login_footer', 'wp_admin_bar_render', 0 );
 
 // Former admin filters that can also be hooked on the front end
 add_action( 'media_buttons', 'media_buttons' );