diff --git a/guides/source/configuring.md b/guides/source/configuring.md
index 3d9d9f21b2bd8..e584d43d6d8e7 100644
--- a/guides/source/configuring.md
+++ b/guides/source/configuring.md
@@ -266,7 +266,7 @@ Defaults to `config/credentials/#{Rails.env}.yml.enc` if it exists, or
 `config/credentials.yml.enc` otherwise.
 
 NOTE: In order for the `bin/rails credentials` commands to recognize this value,
-it must be set in `config/application.rb`.
+it must be set in `config/application.rb` or `config/environments/#{Rails.env}.rb`.
 
 #### `config.credentials.key_path`
 
@@ -276,7 +276,7 @@ Defaults to `config/credentials/#{Rails.env}.key` if it exists, or
 `config/master.key` otherwise.
 
 NOTE: In order for the `bin/rails credentials` commands to recognize this value,
-it must be set in `config/application.rb`.
+it must be set in `config/application.rb` or `config/environments/#{Rails.env}.rb`.
 
 #### `config.debug_exception_response_format`
 
diff --git a/railties/CHANGELOG.md b/railties/CHANGELOG.md
index e4f1aa76dedc1..c34e53ea2ae68 100644
--- a/railties/CHANGELOG.md
+++ b/railties/CHANGELOG.md
@@ -4,7 +4,7 @@
 
 *   Credentials commands (e.g. `bin/rails credentials:edit`) now respect
     `config.credentials.content_path` and `config.credentials.key_path` when set
-    in `config/application.rb`.
+    in `config/application.rb` or `config/environments/#{Rails.env}.rb`.
 
     Before:
 
@@ -25,19 +25,8 @@
         would load for the current `RAILS_ENV`.
 
       * `bin/rails credentials:edit` respects `config.credentials.content_path`
-        and `config.credentials.key_path` when set in `config/application.rb`.
-        Using `RAILS_ENV`, environment-specific paths can be set, such as:
-
-          ```ruby
-          # config/application.rb
-          module MyCoolApp
-            class Application < Rails::Application
-              config.credentials.content_path = "my_credentials/#{Rails.env}.yml.enc"
-
-              config.credentials.key_path = "path/to/production.key" if Rails.env.production?
-            end
-          end
-          ```
+        and `config.credentials.key_path` when set in `config/application.rb`
+        or `config/environments/#{Rails.env}.rb`.
 
       * `bin/rails credentials:edit --environment foo` will create and edit
         `config/credentials/foo.yml.enc` _if_ `config.credentials.content_path`
diff --git a/railties/lib/rails/command/actions.rb b/railties/lib/rails/command/actions.rb
index 50651ad61a9e9..105a4bc4f5a66 100644
--- a/railties/lib/rails/command/actions.rb
+++ b/railties/lib/rails/command/actions.rb
@@ -10,23 +10,21 @@ def set_application_directory!
         Dir.chdir(File.expand_path("../..", APP_PATH)) unless File.exist?(File.expand_path("config.ru"))
       end
 
-      def require_application_and_environment!
-        require_application!
-        require_environment!
-      end
-
       def require_application!
         require ENGINE_PATH if defined?(ENGINE_PATH)
+        require APP_PATH if defined?(APP_PATH)
+      end
 
-        if defined?(APP_PATH)
-          require APP_PATH
-        end
+      def boot_application!
+        require_application!
+        Rails.application.require_environment! if defined?(APP_PATH)
       end
 
-      def require_environment!
-        if defined?(APP_PATH)
-          Rails.application.require_environment!
-        end
+      def load_environment_config!
+        require_application!
+        # Only run initializers that are in the :all group, which includes the
+        # :load_environment_config initializer.
+        Rails.application.initialize!(:_) if defined?(APP_PATH)
       end
 
       if defined?(ENGINE_PATH)
diff --git a/railties/lib/rails/commands/console/console_command.rb b/railties/lib/rails/commands/console/console_command.rb
index ca2939358edf2..d5720ff5fbdf3 100644
--- a/railties/lib/rails/commands/console/console_command.rb
+++ b/railties/lib/rails/commands/console/console_command.rb
@@ -98,7 +98,7 @@ def initialize(args = [], local_options = {}, config = {})
 
       desc "console", "Start the Rails console"
       def perform
-        require_application_and_environment!
+        boot_application!
         Rails::Console.start(Rails.application, options)
       end
     end
diff --git a/railties/lib/rails/commands/credentials/credentials_command.rb b/railties/lib/rails/commands/credentials/credentials_command.rb
index 70aa3cb370977..2967fbc2cd6ec 100644
--- a/railties/lib/rails/commands/credentials/credentials_command.rb
+++ b/railties/lib/rails/commands/credentials/credentials_command.rb
@@ -16,7 +16,7 @@ class CredentialsCommand < Rails::Command::Base # :nodoc:
 
       desc "edit", "Open the decrypted credentials in `$EDITOR` for editing"
       def edit
-        require_application!
+        load_environment_config!
         load_generators
 
         if environment_specified?
@@ -33,7 +33,7 @@ def edit
 
       desc "show", "Show the decrypted credentials"
       def show
-        require_application!
+        load_environment_config!
 
         say credentials.read.presence || missing_credentials_message
       end
@@ -46,7 +46,7 @@ def show
       def diff(content_path = nil)
         if @content_path = content_path
           self.environment = extract_environment_from_path(content_path)
-          require_application!
+          load_environment_config!
 
           say credentials.read.presence || credentials.content_path.read
         else
diff --git a/railties/lib/rails/commands/dbconsole/dbconsole_command.rb b/railties/lib/rails/commands/dbconsole/dbconsole_command.rb
index a3d176aa034c5..542f3b7a1a92a 100644
--- a/railties/lib/rails/commands/dbconsole/dbconsole_command.rb
+++ b/railties/lib/rails/commands/dbconsole/dbconsole_command.rb
@@ -90,7 +90,7 @@ class DbconsoleCommand < Base # :nodoc:
 
       desc "dbconsole", "Start a console for the database specified in config/database.yml"
       def perform
-        require_application_and_environment!
+        boot_application!
         Rails::DBConsole.start(options)
       end
     end
diff --git a/railties/lib/rails/commands/destroy/destroy_command.rb b/railties/lib/rails/commands/destroy/destroy_command.rb
index ef8aa5534d4e7..462c3c3e8a29d 100644
--- a/railties/lib/rails/commands/destroy/destroy_command.rb
+++ b/railties/lib/rails/commands/destroy/destroy_command.rb
@@ -7,7 +7,7 @@ module Command
     class DestroyCommand < Base # :nodoc:
       no_commands do
         def help
-          require_application_and_environment!
+          boot_application!
           load_generators
 
           Rails::Generators.help self.class.command_name
@@ -19,7 +19,7 @@ def perform(*)
         generator = args.shift
         return help unless generator
 
-        require_application_and_environment!
+        boot_application!
         load_generators
 
         Rails::Generators.invoke generator, args, behavior: :revoke, destination_root: Rails::Command.root
diff --git a/railties/lib/rails/commands/encrypted/encrypted_command.rb b/railties/lib/rails/commands/encrypted/encrypted_command.rb
index 0bcb121a5e445..4d9ba509949d1 100644
--- a/railties/lib/rails/commands/encrypted/encrypted_command.rb
+++ b/railties/lib/rails/commands/encrypted/encrypted_command.rb
@@ -14,7 +14,7 @@ class EncryptedCommand < Rails::Command::Base # :nodoc:
 
       desc "edit", "Open the decrypted file in `$EDITOR` for editing"
       def edit(*)
-        require_application!
+        load_environment_config!
 
         ensure_encryption_key_has_been_added
         ensure_encrypted_configuration_has_been_added
@@ -24,7 +24,7 @@ def edit(*)
 
       desc "show", "Show the decrypted contents of the file"
       def show(*)
-        require_application!
+        load_environment_config!
 
         say encrypted_configuration.read.presence || missing_encrypted_configuration_message
       end
diff --git a/railties/lib/rails/commands/generate/generate_command.rb b/railties/lib/rails/commands/generate/generate_command.rb
index 09110a254725c..45611949b8573 100644
--- a/railties/lib/rails/commands/generate/generate_command.rb
+++ b/railties/lib/rails/commands/generate/generate_command.rb
@@ -7,7 +7,7 @@ module Command
     class GenerateCommand < Base # :nodoc:
       no_commands do
         def help
-          require_application_and_environment!
+          boot_application!
           load_generators
 
           Rails::Generators.help self.class.command_name
@@ -18,7 +18,7 @@ def perform(*)
         generator = args.shift
         return help unless generator
 
-        require_application_and_environment!
+        boot_application!
         load_generators
 
         ARGV.replace(args) # set up ARGV for third-party libraries
diff --git a/railties/lib/rails/commands/initializers/initializers_command.rb b/railties/lib/rails/commands/initializers/initializers_command.rb
index b8ad7bf76f4b8..06934cbcb703c 100644
--- a/railties/lib/rails/commands/initializers/initializers_command.rb
+++ b/railties/lib/rails/commands/initializers/initializers_command.rb
@@ -9,7 +9,7 @@ class InitializersCommand < Base # :nodoc:
 
       desc "initializers", "Print out all defined initializers in the order they are invoked by Rails."
       def perform
-        require_application_and_environment!
+        boot_application!
 
         Rails.application.initializers.tsort_each do |initializer|
           say "#{initializer.context_class}.#{initializer.name}"
diff --git a/railties/lib/rails/commands/notes/notes_command.rb b/railties/lib/rails/commands/notes/notes_command.rb
index 24930ff7c34fc..a09e30dbe90a0 100644
--- a/railties/lib/rails/commands/notes/notes_command.rb
+++ b/railties/lib/rails/commands/notes/notes_command.rb
@@ -9,7 +9,7 @@ class NotesCommand < Base # :nodoc:
 
       desc "notes", "Show comments in your code annotated with FIXME, OPTIMIZE, and TODO"
       def perform(*)
-        require_application_and_environment!
+        boot_application!
 
         display_annotations
       end
diff --git a/railties/lib/rails/commands/routes/routes_command.rb b/railties/lib/rails/commands/routes/routes_command.rb
index a179b995ac79c..c979a9014b8a1 100644
--- a/railties/lib/rails/commands/routes/routes_command.rb
+++ b/railties/lib/rails/commands/routes/routes_command.rb
@@ -22,7 +22,7 @@ def invoke_command(*)
 
       desc "routes", "List all the defined routes"
       def perform(*)
-        require_application_and_environment!
+        boot_application!
         require "action_dispatch/routing/inspector"
 
         say inspector.format(formatter, routes_filter)
diff --git a/railties/lib/rails/commands/runner/runner_command.rb b/railties/lib/rails/commands/runner/runner_command.rb
index 56ff04c47a918..0fe58fdfa7f2c 100644
--- a/railties/lib/rails/commands/runner/runner_command.rb
+++ b/railties/lib/rails/commands/runner/runner_command.rb
@@ -25,7 +25,7 @@ def perform(code_or_file = nil, *command_argv)
           exit 1
         end
 
-        require_application_and_environment!
+        boot_application!
         Rails.application.load_runner
 
         ARGV.replace(command_argv)
diff --git a/railties/lib/rails/commands/secrets/secrets_command.rb b/railties/lib/rails/commands/secrets/secrets_command.rb
index 4ba0193f3891d..c379e6ce8c381 100644
--- a/railties/lib/rails/commands/secrets/secrets_command.rb
+++ b/railties/lib/rails/commands/secrets/secrets_command.rb
@@ -16,7 +16,7 @@ def setup
 
       desc "edit", "Open the secrets in `$EDITOR` for editing"
       def edit
-        require_application_and_environment!
+        boot_application!
 
         using_system_editor do
           Rails::Secrets.read_for_editing { |tmp_path| system_editor(tmp_path) }
diff --git a/railties/lib/rails/commands/unused_routes/unused_routes_command.rb b/railties/lib/rails/commands/unused_routes/unused_routes_command.rb
index 8f56deb05ed90..9fd4fbff14890 100644
--- a/railties/lib/rails/commands/unused_routes/unused_routes_command.rb
+++ b/railties/lib/rails/commands/unused_routes/unused_routes_command.rb
@@ -40,7 +40,7 @@ def action_missing?
       end
 
       def perform(*)
-        require_application_and_environment!
+        boot_application!
         require "action_dispatch/routing/inspector"
 
         say(inspector.format(formatter, routes_filter))
diff --git a/railties/test/commands/credentials_test.rb b/railties/test/commands/credentials_test.rb
index 25017dd2ab43c..a8dc2b468de29 100644
--- a/railties/test/commands/credentials_test.rb
+++ b/railties/test/commands/credentials_test.rb
@@ -303,6 +303,28 @@ class Rails::Command::CredentialsCommandTest < ActiveSupport::TestCase
     assert_credentials_paths "config/credentials/production.yml.enc", key_path, environment: "production"
   end
 
+  test "respects config.credentials.content_path when set in config/environments/*.rb" do
+    content_path = "my_secrets/credentials.yml.enc"
+    add_to_env_config "production", "config.credentials.content_path = #{content_path.inspect}"
+
+    with_rails_env "production" do
+      assert_credentials_paths content_path, "config/master.key"
+    end
+
+    assert_credentials_paths content_path, "config/credentials/production.key", environment: "production"
+  end
+
+  test "respects config.credentials.key_path when set in config/environments/*.rb" do
+    key_path = "my_secrets/master.key"
+    add_to_env_config "production", "config.credentials.key_path = #{key_path.inspect}"
+
+    with_rails_env "production" do
+      assert_credentials_paths "config/credentials.yml.enc", key_path
+    end
+
+    assert_credentials_paths "config/credentials/production.yml.enc", key_path, environment: "production"
+  end
+
   private
     DEFAULT_CREDENTIALS_PATTERN = /access_key_id: 123\n.*secret_key_base: \h{128}\n/m