diff --git a/Doc/whatsnew/3.15.rst b/Doc/whatsnew/3.15.rst
index 987cf944972329..73419725fb8080 100644
--- a/Doc/whatsnew/3.15.rst
+++ b/Doc/whatsnew/3.15.rst
@@ -121,6 +121,14 @@ Deprecated
 Removed
 =======
 
+ctypes
+------
+
+* Removed the undocumented function :func:`!ctypes.SetPointerType`,
+  which has been deprecated since Python 3.13.
+  (Contributed by Bénédikt Tran in :gh:`133866`.)
+
+
 http.server
 -----------
 
diff --git a/Lib/ctypes/__init__.py b/Lib/ctypes/__init__.py
index 823a3692fd1bbf..d6d07a13f756e2 100644
--- a/Lib/ctypes/__init__.py
+++ b/Lib/ctypes/__init__.py
@@ -379,12 +379,6 @@ def create_unicode_buffer(init, size=None):
         return buf
     raise TypeError(init)
 
-
-def SetPointerType(pointer, cls):
-    import warnings
-    warnings._deprecated("ctypes.SetPointerType", remove=(3, 15))
-    pointer.set_type(cls)
-
 def ARRAY(typ, len):
     return typ * len
 
diff --git a/Lib/test/test_ctypes/test_incomplete.py b/Lib/test/test_ctypes/test_incomplete.py
index fefdfe9102e668..2f344611995b2c 100644
--- a/Lib/test/test_ctypes/test_incomplete.py
+++ b/Lib/test/test_ctypes/test_incomplete.py
@@ -21,9 +21,7 @@ class cell(Structure):
             _fields_ = [("name", c_char_p),
                         ("next", lpcell)]
 
-        with warnings.catch_warnings():
-            warnings.simplefilter('ignore', DeprecationWarning)
-            ctypes.SetPointerType(lpcell, cell)
+        lpcell.set_type(cell)
 
         self.assertIs(POINTER(cell), lpcell)
 
@@ -50,10 +48,9 @@ class cell(Structure):
             _fields_ = [("name", c_char_p),
                         ("next", lpcell)]
 
-        with self.assertWarns(DeprecationWarning):
-            ctypes.SetPointerType(lpcell, cell)
-
+        lpcell.set_type(cell)
         self.assertIs(POINTER(cell), lpcell)
 
+
 if __name__ == '__main__':
     unittest.main()
diff --git a/Misc/NEWS.d/next/Library/2025-05-11-10-01-48.gh-issue-133866.g3dHP_.rst b/Misc/NEWS.d/next/Library/2025-05-11-10-01-48.gh-issue-133866.g3dHP_.rst
new file mode 100644
index 00000000000000..00f13c9a305eb5
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2025-05-11-10-01-48.gh-issue-133866.g3dHP_.rst
@@ -0,0 +1,3 @@
+Remove the undocumented function :func:`!ctypes.SetPointerType`,
+which has been deprecated since Python 3.13.
+Patch by Bénédikt Tran.