diff --git a/Lib/types.py b/Lib/types.py
index 7e4fec2d25d..4fb2defb8ca 100644
--- a/Lib/types.py
+++ b/Lib/types.py
@@ -156,3 +156,6 @@ class DynamicClassAttribute:
         result = type(self)(self.fget, self.fset, fdel, self.__doc__)
         result.overwrite_doc = self.overwrite_doc
         return result
+
+
+__all__ = [n for n in globals() if n[:1] != '_']
diff --git a/Misc/NEWS b/Misc/NEWS
index a3fc735a965..0e0b2a5802e 100644
--- a/Misc/NEWS
+++ b/Misc/NEWS
@@ -13,6 +13,8 @@ Core and Builtins
 Library
 -------
 
+- Issue #23504: Added an __all__ to the types module.
+
 - Issue #23563: Optimized utility functions in urllib.parse.
 
 - Issue #7830: Flatten nested functools.partial.