diff --git a/starlette/datastructures.py b/starlette/datastructures.py
index f5d74d25f..011efc357 100644
--- a/starlette/datastructures.py
+++ b/starlette/datastructures.py
@@ -107,6 +107,12 @@ def port(self) -> int | None:
     def is_secure(self) -> bool:
         return self.scheme in ("https", "wss")
 
+    def relative_url(self) -> URL:
+        """
+        Get a URL that only includes url path, query string and fragment.
+        """
+        return self.__class__(path=self.path, query=self.query, fragment=self.fragment)
+
     def replace(self, **kwargs: typing.Any) -> URL:
         if "username" in kwargs or "password" in kwargs or "hostname" in kwargs or "port" in kwargs:
             hostname = kwargs.pop("hostname", None)
diff --git a/tests/test_datastructures.py b/tests/test_datastructures.py
index 0e7d35c3c..8b7ed62d8 100644
--- a/tests/test_datastructures.py
+++ b/tests/test_datastructures.py
@@ -90,6 +90,17 @@ def test_hidden_password() -> None:
     assert repr(u) == "URL('https://username:********@example.org/path/to/somewhere')"
 
 
+def test_relative_url() -> None:
+    u = URL("https://example.org/path/to/somewhere")
+    assert u.relative_url() == URL("/path/to/somewhere")
+
+    u = URL("https://username:password@example.org/path/to/somewhere?abc=123")
+    assert u.relative_url() == URL("/path/to/somewhere?abc=123")
+
+    u = URL("https://[fe::2]:12345/path/to/somewhere?abc=123#anchor")
+    assert u.relative_url() == URL("/path/to/somewhere?abc=123#anchor")
+
+
 def test_csv() -> None:
     csv = CommaSeparatedStrings('"localhost", "127.0.0.1", 0.0.0.0')
     assert list(csv) == ["localhost", "127.0.0.1", "0.0.0.0"]