diff --git a/lib/cocina/models/description.rb b/lib/cocina/models/description.rb
index 2dfb8f36..dfe9e3b6 100644
--- a/lib/cocina/models/description.rb
+++ b/lib/cocina/models/description.rb
@@ -7,6 +7,7 @@ class Description < Struct
       attribute :contributor, Types::Strict::Array.of(Contributor).meta(omittable: true)
       attribute :event, Types::Strict::Array.of(Event).meta(omittable: true)
       attribute :form, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
+      attribute :geographic, Types::Strict::Array.of(DescriptiveGeographicMetadata).meta(omittable: true)
       attribute :language, Types::Strict::Array.of(Language).meta(omittable: true)
       attribute :note, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
       attribute :identifier, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
diff --git a/lib/cocina/models/descriptive_geographic_metadata.rb b/lib/cocina/models/descriptive_geographic_metadata.rb
new file mode 100644
index 00000000..8e46b010
--- /dev/null
+++ b/lib/cocina/models/descriptive_geographic_metadata.rb
@@ -0,0 +1,10 @@
+# frozen_string_literal: true
+
+module Cocina
+  module Models
+    class DescriptiveGeographicMetadata < Struct
+      attribute :form, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
+      attribute :subject, Types::Strict::Array.of(DescriptiveValue).meta(omittable: true)
+    end
+  end
+end
diff --git a/openapi.yml b/openapi.yml
index 9a20406e..30c1339e 100644
--- a/openapi.yml
+++ b/openapi.yml
@@ -319,6 +319,11 @@ components:
           type: array
           items:
             $ref: "#/components/schemas/DescriptiveValue"
+        geographic:
+          description: Geographic description for items with coordinates or bounding boxes.
+          type: array
+          items:
+            $ref: "#/components/schemas/DescriptiveGeographicMetadata"
         language:
           description: Languages, scripts, symbolic systems, and notations used in all or
             part of a resource.
@@ -484,6 +489,20 @@ components:
                 $ref: "#/components/schemas/DescriptiveValue"
             valueLanguage:
               $ref: "#/components/schemas/DescriptiveValueLanguage"
+    DescriptiveGeographicMetadata:
+      description: Value model for mods geographic extension metadata
+      type: object
+      additionalProperties: false
+      properties:
+        form:
+          type: array
+          items:
+            $ref: "#/components/schemas/DescriptiveValue"
+        subject:
+          description: Terms associated with the intellectual content of the related resource.
+          type: array
+          items:
+            $ref: "#/components/schemas/DescriptiveValue"    
     DescriptiveParallelValue:
       description: Value model for multiple representations of the same information (e.g. in different languages).
       type: object