diff --git a/Lib/nturl2path.py b/Lib/nturl2path.py
index 3308ee7c1c7..66092e4821a 100644
--- a/Lib/nturl2path.py
+++ b/Lib/nturl2path.py
@@ -22,6 +22,9 @@ def url2pathname(url):
     elif url[:12] == '//localhost/':
         # Skip past 'localhost' authority.
         url = url[11:]
+    if url[:3] == '///':
+        # Skip past extra slash before UNC drive in URL path.
+        url = url[1:]
     # Windows itself uses ":" even in URLs.
     url = url.replace(':', '|')
     if not '|' in url:
diff --git a/Lib/test/test_urllib.py b/Lib/test/test_urllib.py
index e1c1d3170d9..a204ef41c3c 100644
--- a/Lib/test/test_urllib.py
+++ b/Lib/test/test_urllib.py
@@ -1492,7 +1492,7 @@ def test_url2pathname_win(self):
         # UNC paths
         self.assertEqual(fn('//server/path/to/file'), '\\\\server\\path\\to\\file')
         self.assertEqual(fn('////server/path/to/file'), '\\\\server\\path\\to\\file')
-        self.assertEqual(fn('/////server/path/to/file'), '\\\\\\server\\path\\to\\file')
+        self.assertEqual(fn('/////server/path/to/file'), '\\\\server\\path\\to\\file')
         # Localhost paths
         self.assertEqual(fn('//localhost/C:/path/to/file'), 'C:\\path\\to\\file')
         self.assertEqual(fn('//localhost/C|/path/to/file'), 'C:\\path\\to\\file')
diff --git a/Misc/NEWS.d/next/Library/2024-11-22-03-40-02.gh-issue-127078.gI_PaP.rst b/Misc/NEWS.d/next/Library/2024-11-22-03-40-02.gh-issue-127078.gI_PaP.rst
new file mode 100644
index 00000000000..a84c06f3c7a
--- /dev/null
+++ b/Misc/NEWS.d/next/Library/2024-11-22-03-40-02.gh-issue-127078.gI_PaP.rst
@@ -0,0 +1,2 @@
+Fix issue where :func:`urllib.request.url2pathname` failed to discard an
+extra slash before a UNC drive in the URL path on Windows.