diff --git a/infrastructure/environments/demo-cfn-create-args.yaml b/infrastructure/environments/demo-cfn-create-args.yaml
index 419858fd..69f579ff 100644
--- a/infrastructure/environments/demo-cfn-create-args.yaml
+++ b/infrastructure/environments/demo-cfn-create-args.yaml
@@ -33,7 +33,13 @@ Parameters:
 #  - ParameterKey: IAMRoleAndPolicyPrefix
 #    ParameterValue: xxxxxxxxxx
 #  - ParameterKey: CustomDomain
-#    ParameterValue: xxxxxxxxxx
+#    ParameterValue: pcui.example.com
+#  - ParameterKey: CustomDomainCertificateArn
+#    ParameterValue: arn:<PARTITION>:acm:<REGION>:<ACCOUNT>:certificate/<CERTIFICATE_ID>
+#  - ParameterKey: CognitoCustomDomain
+#    ParameterValue: auth-pcui.example.com
+#  - ParameterKey: CognitoCustomDomainCertificateArn
+#    ParameterValue: arn:<PARTITION>:acm:<REGION>:<ACCOUNT>:certificate/<CERTIFICATE_ID>
 Capabilities:
   - CAPABILITY_AUTO_EXPAND
   - CAPABILITY_NAMED_IAM
diff --git a/infrastructure/environments/demo-cfn-update-args.yaml b/infrastructure/environments/demo-cfn-update-args.yaml
index 6c2dae37..cc2a154c 100644
--- a/infrastructure/environments/demo-cfn-update-args.yaml
+++ b/infrastructure/environments/demo-cfn-update-args.yaml
@@ -34,6 +34,12 @@ Parameters:
     UsePreviousValue: true
   - ParameterKey: CustomDomain
     UsePreviousValue: true
+  - ParameterKey: CustomDomainCertificateArn
+    UsePreviousValue: true
+  - ParameterKey: CognitoCustomDomain
+    UsePreviousValue: true
+  - ParameterKey: CognitoCustomDomainCertificateArn
+    UsePreviousValue: true
 Capabilities:
   - CAPABILITY_AUTO_EXPAND
   - CAPABILITY_NAMED_IAM
diff --git a/infrastructure/parallelcluster-ui-cognito.yaml b/infrastructure/parallelcluster-ui-cognito.yaml
index 062ea7c2..93efd61d 100644
--- a/infrastructure/parallelcluster-ui-cognito.yaml
+++ b/infrastructure/parallelcluster-ui-cognito.yaml
@@ -17,10 +17,19 @@ Parameters:
     Description: 'Prefix applied to the name of every IAM role and policy (max length: 10)'
     Default: ''
     MaxLength: 10
+  CustomDomain:
+    Type: String
+    Description: (Optional) Custom domain name. If omitted, the default domain name will be used.
+    Default: ''
+  CustomDomainCertificateArn:
+    Type: String
+    Description: '(Optional) ARN of the ACM Certificate issued for the custom domain. This is required only if `CustomDomain` is specified.'
+    Default: ''
 
 Conditions:
   GovCloud: !Equals [!Ref AWS::Region, 'us-gov-west-1']
   UsePermissionBoundary: !Not [ !Equals [ !Ref PermissionsBoundaryPolicy, '' ] ]
+  UseCustomDomain: !Not [!Equals [!Ref CustomDomain, '']]
 
 Metadata:
   AWS::CloudFormation::Interface:
@@ -34,6 +43,11 @@ Metadata:
         Parameters:
           - IAMRoleAndPolicyPrefix
           - PermissionsBoundaryPolicy
+      - Label:
+          default: (Optional) Custom Domain
+        Parameters:
+          - CustomDomain
+          - CustomDomainCertificateArn
     ParameterLabels:
       AdminUserEmail:
         default: Initial Admin's Email
@@ -73,7 +87,14 @@ Resources:
     Type: AWS::Cognito::UserPoolDomain
     Properties:
       UserPoolId: !Ref CognitoUserPool
-      Domain: !Join [ "-", ["pcui-auth", !Select [2, !Split [ "/", !Ref 'AWS::StackId']]]]
+      Domain: !If
+        - UseCustomDomain
+        - !Ref CustomDomain
+        - !Join [ "-", ["pcui-auth", !Select [2, !Split [ "/", !Ref 'AWS::StackId']]]]
+      CustomDomainConfig: !If
+        - UseCustomDomain
+        - { CertificateArn: !Ref CustomDomainCertificateArn }
+        - !Ref AWS::NoValue
 
   CognitoUserPool:
     Type: AWS::Cognito::UserPool
@@ -125,9 +146,19 @@ Outputs:
 
   UserPoolAuthDomain:
     Description: The domain of the authorization server.
-    Value: !Sub
-      - https://${Domain}.${Auth}.${AWS::Region}.amazoncognito.com
-      - {Domain: !Ref UserPoolDomain, Auth: !If [GovCloud, 'auth-fips', 'auth']}
+    Value: !If
+      - UseCustomDomain
+      - !Sub https://${UserPoolDomain}
+      - !Sub
+        - https://${Domain}.${Auth}.${AWS::Region}.amazoncognito.com
+        - {Domain: !Ref UserPoolDomain, Auth: !If [GovCloud, 'auth-fips', 'auth']}
+
+  CustomDomainEndpoint:
+    Condition: UseCustomDomain
+    Description: |
+      The endpoint associated with the custom domain name. 
+      Add an A record in your DNS for the custom domain name pointing to this endpoint.
+    Value: !GetAtt UserPoolDomain.CloudFrontDistribution
 
   UserPoolId:
     Description: Cognito UserPool Id
diff --git a/infrastructure/parallelcluster-ui.yaml b/infrastructure/parallelcluster-ui.yaml
index c9a84204..f1355f6f 100644
--- a/infrastructure/parallelcluster-ui.yaml
+++ b/infrastructure/parallelcluster-ui.yaml
@@ -66,6 +66,18 @@ Parameters:
     Type: String
     Description: (Optional) Custom domain name. If omitted, the default domain name will be used.
     Default: ''
+  CustomDomainCertificateArn:
+    Type: String
+    Description: '(Optional) ARN of the ACM Certificate issued for the custom domain. This is required only if `CustomDomain` is specified.'
+    Default: ''
+  CognitoCustomDomain:
+    Type: String
+    Description: '(Optional) Custom domain name for Cognito. If omitted, the default Cognito domain name will be used.'
+    Default: ''
+  CognitoCustomDomainCertificateArn:
+    Type: String
+    Description: '(Optional) ARN of the ACM Certificate issued for the Cognito custom domain. This is required only if `CognitoCustomDomain` is specified.'
+    Default: ''
 Metadata:
   AWS::CloudFormation::Interface:
     ParameterGroups:
@@ -108,6 +120,9 @@ Metadata:
           default: (Optional) Custom Domain
         Parameters:
           - CustomDomain
+          - CustomDomainCertificateArn
+          - CognitoCustomDomain
+          - CognitoCustomDomainCertificateArn
       - Label:
           default: (Debugging only) Infrastructure S3 Bucket
         Parameters:
@@ -153,6 +168,7 @@ Conditions:
   UsePermissionBoundaryPCAPI: !Not [!Equals [!Ref PermissionsBoundaryPolicyPCAPI, '']]
   UseIAMRoleAndPolicyPrefix: !Not [!Equals [!Ref IAMRoleAndPolicyPrefix, '']]
   UseCustomDomain: !Not [!Equals [!Ref CustomDomain, '']]
+  UseCognitoCustomDomain: !Not [!Equals [!Ref CognitoCustomDomain, '']]
 
 Mappings:
   ParallelClusterUI:
@@ -171,6 +187,8 @@ Resources:
         AdminUserEmail: !Ref AdminUserEmail
         PermissionsBoundaryPolicy: !Ref PermissionsBoundaryPolicy
         IAMRoleAndPolicyPrefix: !Ref IAMRoleAndPolicyPrefix
+        CustomDomain: !Ref CognitoCustomDomain
+        CustomDomainCertificateArn: !Ref CognitoCustomDomainCertificateArn
       TemplateURL: !Sub
         - '${Bucket}/parallelcluster-ui-cognito.yaml'
         - Bucket: !If 
@@ -1026,6 +1044,26 @@ Resources:
             Effect: Allow
             Sid: SsmGetCommandInvocationPolicy
 
+  ApiGatewayCustomDomain:
+    Condition: UseCustomDomain
+    Type: AWS::ApiGateway::DomainName
+    Properties:
+#      CertificateArn: !Ref CustomDomainCertificateArn
+      DomainName: !Ref CustomDomain
+      EndpointConfiguration:
+        Types:
+          - REGIONAL
+      RegionalCertificateArn: !Ref CustomDomainCertificateArn
+      SecurityPolicy: TLS_1_2
+
+  ApiGatewayCustomDomainMapping:
+    Condition: UseCustomDomain
+    Type: AWS::ApiGateway::BasePathMapping
+    Properties:
+      BasePath: !FindInMap [ ParallelClusterUI, Constants, CustomDomainBasePath ]
+      DomainName: !Ref ApiGatewayCustomDomain
+      RestApiId: !Ref ApiGatewayRestApi
+      Stage: !Ref ApiGatewayRestStage
 
 Outputs:
   ParallelClusterUILambdaArn:
@@ -1043,6 +1081,12 @@ Outputs:
       - !Sub
         - https://${Api}.execute-api.${AWS::Region}.${AWS::URLSuffix}/${Stage}
         - { Api: !Ref ApiGatewayRestApi, Stage: !Ref ApiGatewayRestStage }
+  CustomDomainEndpoint:
+    Condition: UseCustomDomain
+    Description: |
+      The endpoint associated with the custom domain name. 
+      Add an A record in your DNS for the PCUI custom domain name pointing to this endpoint.
+    Value: !GetAtt ApiGatewayCustomDomain.RegionalDomainName
   AppClientId:
     Description: The id of the Cognito app client
     Value: !Ref CognitoAppClient
@@ -1052,3 +1096,9 @@ Outputs:
   UserPoolClientSecretName:
     Description: The app client secret name for ParallelCluster UI.
     Value: !GetAtt UserPoolClientSecret.SecretName
+  CognitoCustomDomainEndpoint:
+    Condition: UseCognitoCustomDomain
+    Description: |
+      The endpoint associated with the Cognito custom domain name. 
+      Add an A record in your DNS for the Cognito custom domain name pointing to this endpoint.
+    Value: !GetAtt Cognito.Outputs.CustomDomainEndpoint