diff --git a/config/locales/client.en.yml b/config/locales/client.en.yml
index e94c3ffa066..5eb7de2b16a 100644
--- a/config/locales/client.en.yml
+++ b/config/locales/client.en.yml
@@ -478,9 +478,6 @@ en:
       facebook:
         title: "with Facebook"
         message: "Authenticating with Facebook (make sure pop up blockers are not enabled)"
-      cas:
-        title: "Log In with CAS"
-        message: "Authenticating with CAS (make sure pop up blockers are not enabled)"
       yahoo:
         title: "with Yahoo"
         message: "Authenticating with Yahoo (make sure pop up blockers are not enabled)"
diff --git a/config/locales/server.en.yml b/config/locales/server.en.yml
index 0987b6a3f7f..c60e69f696e 100644
--- a/config/locales/server.en.yml
+++ b/config/locales/server.en.yml
@@ -466,7 +466,6 @@ en:
     queue_size_warning: 'The number of queued jobs is %{queue_size}, which is high. This could indicate a problem with the Sidekiq process(es), or you may need to add more Sidekiq workers.'
     memory_warning: 'Your server is running with less than 1 GB of total memory. At least 1 GB of memory is recommended.'
     facebook_config_warning: 'The server is configured to allow signup and log in with Facebook (enable_facebook_logins), but the app id and app secret values are not set. Go to <a href="/admin/site_settings">the Site Settings</a> and update the settings. <a href="https://github.com/discourse/discourse/wiki/The-Discourse-Admin-Quick-Start-Guide#enable-facebook-logins" target="_blank">See this guide to learn more</a>.'
-    cas_config_warning: 'The server is configured to allow signup and log in with CAS (enable_cas_logins), but the hostname and domain name values are not set.'
     twitter_config_warning: 'The server is configured to allow signup and log in with Twitter (enable_twitter_logins), but the key and secret values are not set. Go to <a href="/admin/site_settings">the Site Settings</a> and update the settings. <a href="https://github.com/discourse/discourse/wiki/The-Discourse-Admin-Quick-Start-Guide#enable-twitter-logins" target="_blank">See this guide to learn more</a>.'
     github_config_warning: 'The server is configured to allow signup and log in with GitHub (enable_github_logins), but the client id and secret values are not set. Go to <a href="/admin/site_settings">the Site Settings</a> and update the settings. <a href="https://github.com/discourse/discourse/wiki/The-Discourse-Admin-Quick-Start-Guide" target="_blank">See this guide to learn more</a>.'
     s3_config_warning: 'The server is configured to upload files to s3, but at least one the following setting is not set: s3_access_key_id, s3_secret_access_key or s3_upload_bucket. Go to <a href="/admin/site_settings">the Site Settings</a> and update the settings. <a href="http://meta.discourse.org/t/how-to-set-up-image-uploads-to-s3/7229" target="_blank">See "How to set up image uploads to S3?" to learn more</a>.'
@@ -659,10 +658,6 @@ en:
     facebook_app_id: "App id for Facebook authentication, registered at https://developers.facebook.com/apps"
     facebook_app_secret: "App secret for Facebook authentication, registered at https://developers.facebook.com/apps"
 
-    enable_cas_logins: "Enable CAS authentication"
-    cas_hostname: "Hostname for cas server"
-    cas_domainname: "Domain name generated email addresses for cas server"
-
     enable_github_logins: "Enable Github authentication, requires github_client_id and github_client_secret"
     github_client_id: "Client id for Github authentication, registered at https://github.com/settings/applications"
     github_client_secret: "Client secret for Github authentication, registered at https://github.com/settings/applications"
diff --git a/config/site_settings.yml b/config/site_settings.yml
index eed6fa01e35..33c6190b1e2 100644
--- a/config/site_settings.yml
+++ b/config/site_settings.yml
@@ -103,11 +103,6 @@ users:
     default: true
   facebook_app_id: ''
   facebook_app_secret: ''
-  enable_cas_logins:
-    client: true
-    default: false
-  cas_hostname: ''
-  cas_domainname: ''
   enable_github_logins:
     client: true
     default: false