diff --git a/config/routes.rb b/config/routes.rb
index 39a441acdb6d40dbcdbc0468a73daae6b5c625e4..de8595c54afe36731e1402f8ff786742766ddb13 100644
--- a/config/routes.rb
+++ b/config/routes.rb
@@ -86,6 +86,8 @@
     # Terraform service discovery
     get '.well-known/terraform.json' => 'terraform/services#index', as: :terraform_services
 
+    draw :organizations
+
     # Begin of the /-/ scope.
     # Use this scope for all new global routes.
     scope path: '-' do
@@ -170,7 +172,6 @@
 
       draw :operations
       draw :jira_connect
-      draw :organizations
 
       Gitlab.ee do
         draw 'remote_development/resources'
diff --git a/config/routes/organizations.rb b/config/routes/organizations.rb
index 30e11d3473b734aab76c4dcfa868157a94bd02c2..a8ce00cd7149c4103c49fbc6543821d09ae89e81 100644
--- a/config/routes/organizations.rb
+++ b/config/routes/organizations.rb
@@ -1,10 +1,16 @@
 # frozen_string_literal: true
 
-resources(:organizations, only: [:show, :index, :new], param: :organization_path, module: :organizations) do
-  collection do
-    post :preview_markdown
+# Index and new actions use /-/organizations path
+scope '-' do
+  resources(:organizations, only: [:index, :new], module: :organizations) do
+    collection do
+      post :preview_markdown
+    end
   end
+end
 
+# All routes for a specific organization use /o/<organization> path
+resources(:organizations, path: 'o', only: [:show], param: :organization_path, module: :organizations) do
   member do
     get :activity
     get :groups_and_projects
diff --git a/doc/user/reserved_names.md b/doc/user/reserved_names.md
index b8a6fb98983ddf08bc2c0c90d81050496a789ebb..299e1627afbf27cccc4b4de8f0eab2ab1f126d45 100644
--- a/doc/user/reserved_names.md
+++ b/doc/user/reserved_names.md
@@ -86,6 +86,7 @@ You cannot create groups with the following names, because they are reserved for
 - `import`
 - `jwt`
 - `login`
+- `o`
 - `oauth`
 - `profile`
 - `projects`
diff --git a/lib/gitlab/path_regex.rb b/lib/gitlab/path_regex.rb
index 09bf048ce901ab0b95864744875a2774dba5e8cc..5d2ce6b2248948ff5453b6d136ff9fdb72655dfc 100644
--- a/lib/gitlab/path_regex.rb
+++ b/lib/gitlab/path_regex.rb
@@ -36,6 +36,7 @@ module PathRegex
       import
       jwt
       login
+      o
       oauth
       profile
       projects
diff --git a/spec/lib/gitlab/path_regex_spec.rb b/spec/lib/gitlab/path_regex_spec.rb
index 434a2e153720a2df008b12e1f83e0c6eb1f994e5..786f9f989789ea3fcde4690f2857b1e510901764 100644
--- a/spec/lib/gitlab/path_regex_spec.rb
+++ b/spec/lib/gitlab/path_regex_spec.rb
@@ -194,7 +194,7 @@ def failure_message(constant_name, migration_helper, missing_words: [], addition
 
     # We ban new items in this list, see https://gitlab.com/gitlab-org/gitlab/-/issues/215362
     it 'does not allow expansion' do
-      expect(described_class::TOP_LEVEL_ROUTES.size).to eq(38)
+      expect(described_class::TOP_LEVEL_ROUTES.size).to eq(39)
     end
   end