diff --git a/packages/@aws-cdk/region-info/build-tools/aws-entities.ts b/packages/@aws-cdk/region-info/build-tools/aws-entities.ts
index 1588af66c6384..4de606fb1e128 100644
--- a/packages/@aws-cdk/region-info/build-tools/aws-entities.ts
+++ b/packages/@aws-cdk/region-info/build-tools/aws-entities.ts
@@ -4,36 +4,62 @@
  * Not in the list ==> no built-in data for that region.
  */
 export const AWS_REGIONS = [
-  'us-east-2',
-  'us-east-1',
-  'us-west-1',
-  'us-west-2',
-  'us-gov-east-1',
-  'us-gov-west-1',
-  'us-iso-east-1',
-  'us-isob-east-1',
+  /** Africa (Cape Town) */
   'af-south-1',
+  /** Asia Pacific (Hong Kong) */
   'ap-east-1',
-  'ap-south-1',
+  /** Asia Pacific (Tokyo) */
+  'ap-northeast-1',
+  /** Asia Pacific (Seoul) */
   'ap-northeast-2',
+  /** Asia Pacific (Osaka) */
+  'ap-northeast-3',
+  /** Asia Pacific (Mumbai) */
+  'ap-south-1',
+  /** Asia Pacific (Singapore) */
   'ap-southeast-1',
+  /** Asia Pacific (Sydney) */
   'ap-southeast-2',
-  'ap-northeast-1',
+  /** Canada (Central) */
   'ca-central-1',
+  /** China (Beijing) */
   'cn-north-1',
+  /** China (Ningxia) */
   'cn-northwest-1',
+  /** Europe (Frankfurt) */
   'eu-central-1',
+  /** Europe (Stockholm) */
+  'eu-north-1',
+  /** Europe (Milan) */
+  'eu-south-1',
+  /** Europe (Ireland) */
   'eu-west-1',
+  /** Europe (London) */
   'eu-west-2',
+  /** Europe (Paris) */
   'eu-west-3',
-  'eu-north-1',
-  'eu-south-1',
+  /** Middle East (Bahrain) */
   'me-south-1',
+  /** South America (São Paulo) */
   'sa-east-1',
+  /** US East (N. Virginia) */
+  'us-east-1',
+  /** US East (Ohio) */
+  'us-east-2',
+  /** AWS GovCloud (US-East) */
+  'us-gov-east-1',
+  /** AWS GovCloud (US-West) */
+  'us-gov-west-1',
+  'us-iso-east-1',
+  'us-isob-east-1',
+  /** US West (N. California) */
+  'us-west-1',
+  /** US West (Oregon) */
+  'us-west-2',
 ].sort();
 
 /**
- * Possibly non-exaustive list of all service names, used to locate service principals.
+ * Possibly non-exhaustive list of all service names, used to locate service principals.
  *
  * Not in the list ==> default service principal mappings.
  */