diff --git a/schema/chapter.json b/schema/chapter.json
index 7413ac581..7553843ed 100644
--- a/schema/chapter.json
+++ b/schema/chapter.json
@@ -57,6 +57,11 @@
       "minLength": 1,
       "type": "string"
     },
+    "mailing_list": {
+      "description": "The optional mailing list associated with the chapter.",
+      "format": "uri",
+      "type": "string"
+    },
     "name": {
       "description": "The unique name of the chapter.",
       "minLength": 10,
diff --git a/schema/tests/chapter_test.py b/schema/tests/chapter_test.py
index e2d0faf56..d23e40146 100644
--- a/schema/tests/chapter_test.py
+++ b/schema/tests/chapter_test.py
@@ -52,6 +52,9 @@
         ("logo-null.yaml", "None is not of type 'array'"),
         ("meetup_group-empty.yaml", "'' should be non-empty"),
         ("meetup_group-null.yaml", "None is not of type 'string'"),
+        ("mailing-list-empty.yaml", "'' is not a 'uri'"),
+        ("mailing-list-invalid.yaml", "'https://xyz' is not a 'uri'"),
+        ("mailing-list-null.yaml", "None is not a 'uri'"),
         ("name-empty.yaml", "'' is too short"),
         ("name-null.yaml", "None is not of type 'string'"),
         ("name-undefined.yaml", "'name' is a required property"),
diff --git a/schema/tests/data/chapter/negative/mailing-list-empty.yaml b/schema/tests/data/chapter/negative/mailing-list-empty.yaml
new file mode 100644
index 000000000..778dd5138
--- /dev/null
+++ b/schema/tests/data/chapter/negative/mailing-list-empty.yaml
@@ -0,0 +1,12 @@
+leaders:
+  - github: leader-name-1
+    name: Leader Name 1
+  - github: leader-name-2
+    name: Leader Name 2
+mailing_list: ''
+name: Valid Chapter Name
+tags:
+  - example-tag-1
+  - example-tag-2
+  - example-tag-3
+type: code
diff --git a/schema/tests/data/chapter/negative/mailing-list-invalid.yaml b/schema/tests/data/chapter/negative/mailing-list-invalid.yaml
new file mode 100644
index 000000000..7c7490061
--- /dev/null
+++ b/schema/tests/data/chapter/negative/mailing-list-invalid.yaml
@@ -0,0 +1,12 @@
+leaders:
+  - github: leader-name-1
+    name: Leader Name 1
+  - github: leader-name-2
+    name: Leader Name 2
+mailing_list: https://xyz
+name: Valid Chapter Name
+tags:
+  - example-tag-1
+  - example-tag-2
+  - example-tag-3
+type: code
diff --git a/schema/tests/data/chapter/negative/mailing-list-null.yaml b/schema/tests/data/chapter/negative/mailing-list-null.yaml
new file mode 100644
index 000000000..fb07b6dc1
--- /dev/null
+++ b/schema/tests/data/chapter/negative/mailing-list-null.yaml
@@ -0,0 +1,12 @@
+leaders:
+  - github: leader-name-1
+    name: Leader Name 1
+  - github: leader-name-2
+    name: Leader Name 2
+mailing_list:
+name: Valid Chapter Name
+tags:
+  - example-tag-1
+  - example-tag-2
+  - example-tag-3
+type: code