diff --git a/releasenotes/notes/change-default-region-for-placement-to-empty-string-394f1132c28345bb.yaml b/releasenotes/notes/change-default-region-for-placement-to-empty-string-394f1132c28345bb.yaml
new file mode 100644
index 0000000..a28e4e2
--- /dev/null
+++ b/releasenotes/notes/change-default-region-for-placement-to-empty-string-394f1132c28345bb.yaml
@@ -0,0 +1,13 @@
+---
+upgrade:
+  - |
+     Default value of config option ``CONF.placement.region`` is updated
+     from ``RegionOne`` to empty string.
+
+     As per tempest design, if tempest conf is not having any region for
+     a service then identity region should be used. In case of placement
+     the default value is "RegionOne" which is considered as placement
+     region if region missing in tempest conf. In order to have identity
+     region to be used as default we need to change to empty string for
+     placement service. Empty string can be seen being used in other
+     services like volume, image etc.
diff --git a/tempest/config.py b/tempest/config.py
index 32cebc5..4e08a11 100644
--- a/tempest/config.py
+++ b/tempest/config.py
@@ -390,7 +390,7 @@
                default='placement',
                help="Catalog type of the Placement service."),
     cfg.StrOpt('region',
-               default='RegionOne',
+               default='',
                help="The placement region name to use. If empty, the value "
                     "of [identity]/region is used instead. If no such region "
                     "is found in the service catalog, the first region found "