diff --git a/manifests/init.pp b/manifests/init.pp
index a5ac1657..a612a066 100644
--- a/manifests/init.pp
+++ b/manifests/init.pp
@@ -88,6 +88,10 @@
 #    (optional) Maximum number of Swift containers/objects to display
 #    on a single page. Defaults to 1000.
 #
+#  [*dropdown_max_items*]
+#    (optional) Specify a maximum number of items to display in a dropdown.
+#    Defaults to 30
+#
 #  [*log_handler*]
 #    (optional) Log handler. Defaults to 'file'
 #
@@ -475,6 +479,7 @@ class horizon(
   $secondary_endpoint_type             = undef,
   $available_regions                   = undef,
   $api_result_limit                    = 1000,
+  $dropdown_max_items                  = 30,
   $log_handler                         = 'file',
   $log_level                           = 'INFO',
   $help_url                            = 'http://docs.openstack.org',
diff --git a/releasenotes/notes/add-dropdown_max_items-38ea8e64152d76e5.yaml b/releasenotes/notes/add-dropdown_max_items-38ea8e64152d76e5.yaml
new file mode 100644
index 00000000..2d7894d3
--- /dev/null
+++ b/releasenotes/notes/add-dropdown_max_items-38ea8e64152d76e5.yaml
@@ -0,0 +1,6 @@
+---
+features:
+  - |
+    Added new horizon::dropdown_max_items parameter that configures the
+    DROPDOWN_MAX_ITEMS config option in local_settings.py. Default value
+    is set to 30 like the Horizon default is.
diff --git a/spec/classes/horizon_init_spec.rb b/spec/classes/horizon_init_spec.rb
index 72e2a78b..d6f6cf81 100644
--- a/spec/classes/horizon_init_spec.rb
+++ b/spec/classes/horizon_init_spec.rb
@@ -76,6 +76,7 @@ describe 'horizon' do
           "    'enable_security_group': True,",
           "    'enable_vpn': False,",
           'API_RESULT_LIMIT = 1000',
+          'DROPDOWN_MAX_ITEMS = 30',
           'TIME_ZONE = "UTC"',
           'COMPRESS_OFFLINE = True',
           "FILE_UPLOAD_TEMP_DIR = '/tmp'",
@@ -111,6 +112,7 @@ describe 'horizon' do
           :django_debug                   => true,
           :site_branding                  => 'mysite',
           :api_result_limit               => 4682,
+          :dropdown_max_items             => 123,
           :compress_offline               => false,
           :hypervisor_options             => {'can_set_mount_point' => false, 'can_set_password' => true },
           :cinder_options                 => {'enable_backup' => true },
@@ -198,6 +200,7 @@ describe 'horizon' do
           'OPENSTACK_ENDPOINT_TYPE = "internalURL"',
           'SECONDARY_ENDPOINT_TYPE = "ANY-VALUE"',
           'API_RESULT_LIMIT = 4682',
+          'DROPDOWN_MAX_ITEMS = 123',
           'TIME_ZONE = "Asia/Shanghai"',
           "AVAILABLE_THEMES = [",
           "  ('default', 'Default', 'themes/default'),",
diff --git a/templates/local_settings.py.erb b/templates/local_settings.py.erb
index a3defc96..f40f0c76 100644
--- a/templates/local_settings.py.erb
+++ b/templates/local_settings.py.erb
@@ -585,7 +585,7 @@ API_RESULT_PAGE_SIZE = 20
 #SWIFT_FILE_TRANSFER_CHUNK_SIZE = 512 * 1024
 
 # Specify a maximum number of items to display in a dropdown.
-#DROPDOWN_MAX_ITEMS = 30
+DROPDOWN_MAX_ITEMS = <%= @dropdown_max_items %>
 
 # The timezone of the server. This should correspond with the timezone
 # of your entire OpenStack installation, and hopefully be in UTC.