diff --git a/manifests/api.pp b/manifests/api.pp
index 15154774..26d5ab52 100644
--- a/manifests/api.pp
+++ b/manifests/api.pp
@@ -14,12 +14,6 @@
 #   http://auth_url:5000/v3
 #   Defaults to $::os_service_default.
 #
-# [*os_region_name*]
-#   (optional) Some operations require cinder to make API requests
-#   to Nova. This sets the keystone region to be used for these
-#   requests. For example, boot-from-volume.
-#   Defaults to $::os_service_default
-#
 # [*service_workers*]
 #   (optional) Number of cinder-api workers
 #   Defaults to $::os_workers
@@ -125,8 +119,15 @@
 #   Example of valid value: barbican
 #   Defaults to $::os_service_default
 #
+# DEPRECATED PARAMETERS
+#
+# [*os_region_name*]
+#   (optional) Some operations require cinder to make API requests
+#   to Nova. This sets the keystone region to be used for these
+#   requests. For example, boot-from-volume.
+#   Defaults to undef
+#
 class cinder::api (
-  $os_region_name                 = $::os_service_default,
   $keymgr_encryption_api_url      = $::os_service_default,
   $keymgr_encryption_auth_url     = $::os_service_default,
   $service_workers                = $::os_workers,
@@ -153,12 +154,19 @@ class cinder::api (
   $auth_strategy                  = 'keystone',
   $osapi_volume_listen_port       = $::os_service_default,
   $keymgr_backend                 = $::os_service_default,
+  # DEPRECATED PARAMETERS
+  $os_region_name                 = undef
 ) inherits cinder::params {
 
   include cinder::deps
   include cinder::params
   include cinder::policy
 
+  if $os_region_name != undef {
+    warning('cinder::api::os_region_name is deprecated and has no effect. \
+Use cinder::nova::region_name instead')
+  }
+
   validate_legacy(Boolean, 'validate_bool', $manage_service)
   validate_legacy(Boolean, 'validate_bool', $enabled)
 
@@ -222,7 +230,6 @@ running as a standalone service, or httpd for being run by a httpd server")
   cinder_config {
     'DEFAULT/osapi_volume_listen':      value => $bind_host;
     'DEFAULT/osapi_volume_workers':     value => $service_workers;
-    'DEFAULT/os_region_name':           value => $os_region_name;
     'DEFAULT/default_volume_type':      value => $default_volume_type;
     'DEFAULT/public_endpoint':          value => $public_endpoint;
     'DEFAULT/osapi_volume_base_URL':    value => $osapi_volume_base_url;
diff --git a/releasenotes/notes/deprecate-cinder-api-os_region_name-812ccb925f867a52.yaml b/releasenotes/notes/deprecate-cinder-api-os_region_name-812ccb925f867a52.yaml
new file mode 100644
index 00000000..e287cedc
--- /dev/null
+++ b/releasenotes/notes/deprecate-cinder-api-os_region_name-812ccb925f867a52.yaml
@@ -0,0 +1,5 @@
+---
+deprecations:
+  - |
+    The cinder::api::os_region_name parameter was deprecated and has no effect.
+    Use cinder::nova::region_name instead.
diff --git a/spec/classes/cinder_api_spec.rb b/spec/classes/cinder_api_spec.rb
index f4286a03..5d30cef9 100644
--- a/spec/classes/cinder_api_spec.rb
+++ b/spec/classes/cinder_api_spec.rb
@@ -30,7 +30,6 @@ describe 'cinder::api' do
         is_expected.to contain_cinder_config('DEFAULT/public_endpoint').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_cinder_config('DEFAULT/osapi_volume_base_URL').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_cinder_config('DEFAULT/osapi_max_limit').with_value('<SERVICE DEFAULT>')
-        is_expected.to contain_cinder_config('DEFAULT/os_region_name').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_cinder_config('DEFAULT/auth_strategy').with_value('keystone')
         is_expected.to contain_cinder_config('key_manager/backend').with_value('<SERVICE DEFAULT>')
         is_expected.to contain_cinder_config('barbican/barbican_endpoint').with_value('<SERVICE DEFAULT>')
@@ -44,17 +43,6 @@ describe 'cinder::api' do
       end
     end
 
-    context 'with a custom region for nova' do
-      let :params do
-        req_params.merge({'os_region_name' => 'MyRegion'})
-      end
-      it 'should configure the region for nova' do
-        is_expected.to contain_cinder_config('DEFAULT/os_region_name').with(
-          :value => 'MyRegion'
-        )
-      end
-    end
-
     context 'with a customized port' do
       let :params do
         req_params.merge({'osapi_volume_listen_port' => 9999})