diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index f97c1bbd0b13a..7e34cecb2e902 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -30,13 +30,13 @@ Changes that are cosmetic in nature and do not add anything substantial to the s
 
 #### **Do you intend to add a new feature or change an existing one?**
 
-* Suggest your change in the [rubyonrails-core mailing list](https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-core) and start writing code.
+* Suggest your change in the [rubyonrails-core mailing list](https://discuss.rubyonrails.org/c/rubyonrails-core) and start writing code.
 
 * Do not open an issue on GitHub until you have collected positive feedback about the change. GitHub issues are primarily intended for bug reports and fixes.
 
 #### **Do you have questions about the source code?**
 
-* Ask any question about how to use Ruby on Rails in the [rubyonrails-talk mailing list](https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-talk).
+* Ask any question about how to use Ruby on Rails in the [rubyonrails-talk mailing list](https://discuss.rubyonrails.org/c/rubyonrails-talk).
 
 #### **Do you want to contribute to the Rails documentation?**
 
diff --git a/actioncable/README.md b/actioncable/README.md
index 38eb251f42f05..8864e4e0aede5 100644
--- a/actioncable/README.md
+++ b/actioncable/README.md
@@ -21,4 +21,4 @@ Bug reports for the Ruby on Rails project can be filed here:
 
 Feature requests should be discussed on the rails-core mailing list here:
 
-* https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-core
+* https://discuss.rubyonrails.org/c/rubyonrails-core
diff --git a/actioncable/actioncable.gemspec b/actioncable/actioncable.gemspec
index da9301b01cdfc..60751c3dfee17 100644
--- a/actioncable/actioncable.gemspec
+++ b/actioncable/actioncable.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |s|
     "bug_tracker_uri"   => "https://github.com/rails/rails/issues",
     "changelog_uri"     => "https://github.com/rails/rails/blob/v#{version}/actioncable/CHANGELOG.md",
     "documentation_uri" => "https://api.rubyonrails.org/v#{version}/",
-    "mailing_list_uri"  => "https://groups.google.com/forum/#!forum/rubyonrails-talk",
+    "mailing_list_uri"  => "https://discuss.rubyonrails.org/c/rubyonrails-talk",
     "source_code_uri"   => "https://github.com/rails/rails/tree/v#{version}/actioncable",
   }
 
diff --git a/actionmailbox/actionmailbox.gemspec b/actionmailbox/actionmailbox.gemspec
index e6ee729b24f8e..47501b1cd19e9 100644
--- a/actionmailbox/actionmailbox.gemspec
+++ b/actionmailbox/actionmailbox.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |s|
     "bug_tracker_uri"   => "https://github.com/rails/rails/issues",
     "changelog_uri"     => "https://github.com/rails/rails/blob/v#{version}/actionmailbox/CHANGELOG.md",
     "documentation_uri" => "https://api.rubyonrails.org/v#{version}/",
-    "mailing_list_uri"  => "https://groups.google.com/forum/#!forum/rubyonrails-talk",
+    "mailing_list_uri"  => "https://discuss.rubyonrails.org/c/rubyonrails-talk",
     "source_code_uri"   => "https://github.com/rails/rails/tree/v#{version}/actionmailbox",
   }
 
diff --git a/actionmailer/README.rdoc b/actionmailer/README.rdoc
index 0db4b2668be33..f9c84b4232c8f 100644
--- a/actionmailer/README.rdoc
+++ b/actionmailer/README.rdoc
@@ -138,4 +138,4 @@ Bug reports for the Ruby on Rails project can be filed here:
 
 Feature requests should be discussed on the rails-core mailing list here:
 
-* https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-core
+* https://discuss.rubyonrails.org/c/rubyonrails-core
diff --git a/actionmailer/actionmailer.gemspec b/actionmailer/actionmailer.gemspec
index af982a8a8e98b..5cce629dbe8f8 100644
--- a/actionmailer/actionmailer.gemspec
+++ b/actionmailer/actionmailer.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |s|
     "bug_tracker_uri"   => "https://github.com/rails/rails/issues",
     "changelog_uri"     => "https://github.com/rails/rails/blob/v#{version}/actionmailer/CHANGELOG.md",
     "documentation_uri" => "https://api.rubyonrails.org/v#{version}/",
-    "mailing_list_uri"  => "https://groups.google.com/forum/#!forum/rubyonrails-talk",
+    "mailing_list_uri"  => "https://discuss.rubyonrails.org/c/rubyonrails-talk",
     "source_code_uri"   => "https://github.com/rails/rails/tree/v#{version}/actionmailer",
   }
 
diff --git a/actionpack/README.rdoc b/actionpack/README.rdoc
index fe85bc5b7ab9e..67d0c62a84815 100644
--- a/actionpack/README.rdoc
+++ b/actionpack/README.rdoc
@@ -55,4 +55,4 @@ Bug reports for the Ruby on Rails project can be filed here:
 
 Feature requests should be discussed on the rails-core mailing list here:
 
-* https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-core
+* https://discuss.rubyonrails.org/c/rubyonrails-core
diff --git a/actionpack/actionpack.gemspec b/actionpack/actionpack.gemspec
index 8e587a598168a..332f861acda1b 100644
--- a/actionpack/actionpack.gemspec
+++ b/actionpack/actionpack.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |s|
     "bug_tracker_uri"   => "https://github.com/rails/rails/issues",
     "changelog_uri"     => "https://github.com/rails/rails/blob/v#{version}/actionpack/CHANGELOG.md",
     "documentation_uri" => "https://api.rubyonrails.org/v#{version}/",
-    "mailing_list_uri"  => "https://groups.google.com/forum/#!forum/rubyonrails-talk",
+    "mailing_list_uri"  => "https://discuss.rubyonrails.org/c/rubyonrails-talk",
     "source_code_uri"   => "https://github.com/rails/rails/tree/v#{version}/actionpack",
   }
 
diff --git a/actiontext/actiontext.gemspec b/actiontext/actiontext.gemspec
index f74bb135d5a5b..8c5e6564e3ec1 100644
--- a/actiontext/actiontext.gemspec
+++ b/actiontext/actiontext.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |s|
     "bug_tracker_uri"   => "https://github.com/rails/rails/issues",
     "changelog_uri"     => "https://github.com/rails/rails/blob/v#{version}/actiontext/CHANGELOG.md",
     "documentation_uri" => "https://api.rubyonrails.org/v#{version}/",
-    "mailing_list_uri"  => "https://groups.google.com/forum/#!forum/rubyonrails-talk",
+    "mailing_list_uri"  => "https://discuss.rubyonrails.org/c/rubyonrails-talk",
     "source_code_uri"   => "https://github.com/rails/rails/tree/v#{version}/actiontext",
   }
 
diff --git a/actionview/README.rdoc b/actionview/README.rdoc
index ba50c67024f1f..388aa4ff7b113 100644
--- a/actionview/README.rdoc
+++ b/actionview/README.rdoc
@@ -37,4 +37,4 @@ Bug reports for the Ruby on Rails project can be filed here:
 
 Feature requests should be discussed on the rails-core mailing list here:
 
-* https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-core
+* https://discuss.rubyonrails.org/c/rubyonrails-core
diff --git a/actionview/actionview.gemspec b/actionview/actionview.gemspec
index ace7ee1a9e1a7..69cef1e8e5aa8 100644
--- a/actionview/actionview.gemspec
+++ b/actionview/actionview.gemspec
@@ -25,7 +25,7 @@ Gem::Specification.new do |s|
     "bug_tracker_uri"   => "https://github.com/rails/rails/issues",
     "changelog_uri"     => "https://github.com/rails/rails/blob/v#{version}/actionview/CHANGELOG.md",
     "documentation_uri" => "https://api.rubyonrails.org/v#{version}/",
-    "mailing_list_uri"  => "https://groups.google.com/forum/#!forum/rubyonrails-talk",
+    "mailing_list_uri"  => "https://discuss.rubyonrails.org/c/rubyonrails-talk",
     "source_code_uri"   => "https://github.com/rails/rails/tree/v#{version}/actionview",
   }
 
diff --git a/activejob/README.md b/activejob/README.md
index 462d319992833..35536980e5fd0 100644
--- a/activejob/README.md
+++ b/activejob/README.md
@@ -130,4 +130,4 @@ Bug reports for the Ruby on Rails project can be filed here:
 
 Feature requests should be discussed on the rails-core mailing list here:
 
-* https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-core
+* https://discuss.rubyonrails.org/c/rubyonrails-core
diff --git a/activejob/activejob.gemspec b/activejob/activejob.gemspec
index ba8138384ba57..9775cb2983998 100644
--- a/activejob/activejob.gemspec
+++ b/activejob/activejob.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |s|
     "bug_tracker_uri"   => "https://github.com/rails/rails/issues",
     "changelog_uri"     => "https://github.com/rails/rails/blob/v#{version}/activejob/CHANGELOG.md",
     "documentation_uri" => "https://api.rubyonrails.org/v#{version}/",
-    "mailing_list_uri"  => "https://groups.google.com/forum/#!forum/rubyonrails-talk",
+    "mailing_list_uri"  => "https://discuss.rubyonrails.org/c/rubyonrails-talk",
     "source_code_uri"   => "https://github.com/rails/rails/tree/v#{version}/activejob",
   }
 
diff --git a/activemodel/README.rdoc b/activemodel/README.rdoc
index f9370d8de0744..bf910846c41d5 100644
--- a/activemodel/README.rdoc
+++ b/activemodel/README.rdoc
@@ -263,4 +263,4 @@ Bug reports for the Ruby on Rails project can be filed here:
 
 Feature requests should be discussed on the rails-core mailing list here:
 
-* https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-core
+* https://discuss.rubyonrails.org/c/rubyonrails-core
diff --git a/activemodel/activemodel.gemspec b/activemodel/activemodel.gemspec
index 7659f0e94dd35..30a0697d3842e 100644
--- a/activemodel/activemodel.gemspec
+++ b/activemodel/activemodel.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |s|
     "bug_tracker_uri"   => "https://github.com/rails/rails/issues",
     "changelog_uri"     => "https://github.com/rails/rails/blob/v#{version}/activemodel/CHANGELOG.md",
     "documentation_uri" => "https://api.rubyonrails.org/v#{version}/",
-    "mailing_list_uri"  => "https://groups.google.com/forum/#!forum/rubyonrails-talk",
+    "mailing_list_uri"  => "https://discuss.rubyonrails.org/c/rubyonrails-talk",
     "source_code_uri"   => "https://github.com/rails/rails/tree/v#{version}/activemodel",
   }
 
diff --git a/activerecord/README.rdoc b/activerecord/README.rdoc
index be573af4bafbd..f02ff204000e6 100644
--- a/activerecord/README.rdoc
+++ b/activerecord/README.rdoc
@@ -216,4 +216,4 @@ Bug reports for the Ruby on Rails project can be filed here:
 
 Feature requests should be discussed on the rails-core mailing list here:
 
-* https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-core
+* https://discuss.rubyonrails.org/c/rubyonrails-core
diff --git a/activerecord/activerecord.gemspec b/activerecord/activerecord.gemspec
index 0e162d195594a..1e295fc27cc18 100644
--- a/activerecord/activerecord.gemspec
+++ b/activerecord/activerecord.gemspec
@@ -27,7 +27,7 @@ Gem::Specification.new do |s|
     "bug_tracker_uri"   => "https://github.com/rails/rails/issues",
     "changelog_uri"     => "https://github.com/rails/rails/blob/v#{version}/activerecord/CHANGELOG.md",
     "documentation_uri" => "https://api.rubyonrails.org/v#{version}/",
-    "mailing_list_uri"  => "https://groups.google.com/forum/#!forum/rubyonrails-talk",
+    "mailing_list_uri"  => "https://discuss.rubyonrails.org/c/rubyonrails-talk",
     "source_code_uri"   => "https://github.com/rails/rails/tree/v#{version}/activerecord",
   }
 
diff --git a/activestorage/README.md b/activestorage/README.md
index 7a437d4014593..01f41adf4bd68 100644
--- a/activestorage/README.md
+++ b/activestorage/README.md
@@ -159,4 +159,4 @@ Bug reports for the Ruby on Rails project can be filed here:
 
 Feature requests should be discussed on the rails-core mailing list here:
 
-* https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-core
+* https://discuss.rubyonrails.org/c/rubyonrails-core
diff --git a/activestorage/activestorage.gemspec b/activestorage/activestorage.gemspec
index 61cc28e34fe15..a3fdc130a8511 100644
--- a/activestorage/activestorage.gemspec
+++ b/activestorage/activestorage.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |s|
     "bug_tracker_uri"   => "https://github.com/rails/rails/issues",
     "changelog_uri"     => "https://github.com/rails/rails/blob/v#{version}/activestorage/CHANGELOG.md",
     "documentation_uri" => "https://api.rubyonrails.org/v#{version}/",
-    "mailing_list_uri"  => "https://groups.google.com/forum/#!forum/rubyonrails-talk",
+    "mailing_list_uri"  => "https://discuss.rubyonrails.org/c/rubyonrails-talk",
     "source_code_uri"   => "https://github.com/rails/rails/tree/v#{version}/activestorage",
   }
 
diff --git a/activesupport/README.rdoc b/activesupport/README.rdoc
index d8d25d86c84de..c56e63fa85ced 100644
--- a/activesupport/README.rdoc
+++ b/activesupport/README.rdoc
@@ -37,4 +37,4 @@ Bug reports for the Ruby on Rails project can be filed here:
 
 Feature requests should be discussed on the rails-core mailing list here:
 
-* https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-core
+* https://discuss.rubyonrails.org/c/rubyonrails-core
diff --git a/activesupport/activesupport.gemspec b/activesupport/activesupport.gemspec
index 8e3d0d3c90870..1de7ee06651b7 100644
--- a/activesupport/activesupport.gemspec
+++ b/activesupport/activesupport.gemspec
@@ -26,7 +26,7 @@ Gem::Specification.new do |s|
     "bug_tracker_uri"   => "https://github.com/rails/rails/issues",
     "changelog_uri"     => "https://github.com/rails/rails/blob/v#{version}/activesupport/CHANGELOG.md",
     "documentation_uri" => "https://api.rubyonrails.org/v#{version}/",
-    "mailing_list_uri"  => "https://groups.google.com/forum/#!forum/rubyonrails-talk",
+    "mailing_list_uri"  => "https://discuss.rubyonrails.org/c/rubyonrails-talk",
     "source_code_uri"   => "https://github.com/rails/rails/tree/v#{version}/activesupport",
   }
 
diff --git a/guides/source/3_0_release_notes.md b/guides/source/3_0_release_notes.md
index 15704acefe960..382cf47a3c366 100644
--- a/guides/source/3_0_release_notes.md
+++ b/guides/source/3_0_release_notes.md
@@ -73,7 +73,7 @@ $ ruby script/plugin install git://github.com/rails/rails_upgrade.git
 
 You can see an example of how that works at [Rails Upgrade is now an Official Plugin](http://omgbloglol.com/post/364624593/rails-upgrade-is-now-an-official-plugin)
 
-Aside from Rails Upgrade tool, if you need more help, there are people on IRC and [rubyonrails-talk](https://groups.google.com/group/rubyonrails-talk) that are probably doing the same thing, possibly hitting the same issues. Be sure to blog your own experiences when upgrading so others can benefit from your knowledge!
+Aside from Rails Upgrade tool, if you need more help, there are people on IRC and [rubyonrails-talk](https://discuss.rubyonrails.org/c/rubyonrails-talk) that are probably doing the same thing, possibly hitting the same issues. Be sure to blog your own experiences when upgrading so others can benefit from your knowledge!
 
 Creating a Rails 3.0 application
 --------------------------------
diff --git a/guides/source/contributing_to_ruby_on_rails.md b/guides/source/contributing_to_ruby_on_rails.md
index f86589bdf10a8..eeb301e684408 100644
--- a/guides/source/contributing_to_ruby_on_rails.md
+++ b/guides/source/contributing_to_ruby_on_rails.md
@@ -73,7 +73,7 @@ submissions! They just won't get backported to maintenance branches.
 
 If you'd like feedback on an idea for a feature before doing the work to make
 a patch, please send an email to the [rails-core mailing
-list](https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-core). You
+list](https://discuss.rubyonrails.org/c/rubyonrails-core). You
 might get no response, which means that everyone is indifferent. You might find
 someone who's also interested in building that feature. You might get a "This
 won't be accepted." But it's the proper place to discuss new ideas. GitHub
@@ -587,7 +587,7 @@ is the open source life.
 
 If it's been over a week, and you haven't heard anything, you might want to try
 and nudge things along. You can use the [rubyonrails-core mailing
-list](https://groups.google.com/forum/#!forum/rubyonrails-core) for this. You can also
+list](https://discuss.rubyonrails.org/c/rubyonrails-core) for this. You can also
 leave another comment on the pull request.
 
 While you're waiting for feedback on your pull request, open up a few other
diff --git a/guides/source/getting_started.md b/guides/source/getting_started.md
index abeb48293f6ac..40da25354c36e 100644
--- a/guides/source/getting_started.md
+++ b/guides/source/getting_started.md
@@ -2094,7 +2094,7 @@ getting up and running with Rails, feel free to consult these support
 resources:
 
 * The [Ruby on Rails Guides](index.html)
-* The [Ruby on Rails mailing list](https://groups.google.com/group/rubyonrails-talk)
+* The [Ruby on Rails mailing list](https://discuss.rubyonrails.org/c/rubyonrails-talk)
 * The [#rubyonrails](irc://irc.freenode.net/#rubyonrails) channel on irc.freenode.net
 
 
diff --git a/guides/source/layout.html.erb b/guides/source/layout.html.erb
index 3ffd7ff1ac07e..72c676202e216 100644
--- a/guides/source/layout.html.erb
+++ b/guides/source/layout.html.erb
@@ -116,7 +116,7 @@
           <%= link_to 'open an issue', 'https://github.com/rails/rails/issues' %>.
         </p>
         <p>And last but not least, any kind of discussion regarding Ruby on Rails
-          documentation is very welcome on the <%= link_to 'rubyonrails-docs mailing list', 'https://groups.google.com/forum/#!forum/rubyonrails-docs' %>.
+          documentation is very welcome on the <%= link_to 'rubyonrails-docs mailing list', 'https://discuss.rubyonrails.org/c/rubyonrails-docs' %>.
         </p>
       </div>
     </div>
diff --git a/rails.gemspec b/rails.gemspec
index aff6a1c557c61..51d98910f99eb 100644
--- a/rails.gemspec
+++ b/rails.gemspec
@@ -24,7 +24,7 @@ Gem::Specification.new do |s|
     "bug_tracker_uri"   => "https://github.com/rails/rails/issues",
     "changelog_uri"     => "https://github.com/rails/rails/releases/tag/v#{version}",
     "documentation_uri" => "https://api.rubyonrails.org/v#{version}/",
-    "mailing_list_uri"  => "https://groups.google.com/forum/#!forum/rubyonrails-talk",
+    "mailing_list_uri"  => "https://discuss.rubyonrails.org/c/rubyonrails-talk",
     "source_code_uri"   => "https://github.com/rails/rails/tree/v#{version}",
   }
 
diff --git a/railties/README.rdoc b/railties/README.rdoc
index 51437e3147139..26404743c420a 100644
--- a/railties/README.rdoc
+++ b/railties/README.rdoc
@@ -37,4 +37,4 @@ Bug reports can be filed for the Ruby on Rails project here:
 
 Feature requests should be discussed on the rails-core mailing list here:
 
-* https://groups.google.com/forum/?fromgroups#!forum/rubyonrails-core
+* https://discuss.rubyonrails.org/c/rubyonrails-core
diff --git a/railties/railties.gemspec b/railties/railties.gemspec
index 11f31537d6b99..70e3e33fa9a2f 100644
--- a/railties/railties.gemspec
+++ b/railties/railties.gemspec
@@ -29,7 +29,7 @@ Gem::Specification.new do |s|
     "bug_tracker_uri"   => "https://github.com/rails/rails/issues",
     "changelog_uri"     => "https://github.com/rails/rails/blob/v#{version}/railties/CHANGELOG.md",
     "documentation_uri" => "https://api.rubyonrails.org/v#{version}/",
-    "mailing_list_uri"  => "https://groups.google.com/forum/#!forum/rubyonrails-talk",
+    "mailing_list_uri"  => "https://discuss.rubyonrails.org/c/rubyonrails-talk",
     "source_code_uri"   => "https://github.com/rails/rails/tree/v#{version}/railties",
   }