diff --git a/integration_tests/_helpers.py b/integration_tests/_helpers.py
index bfcc16704b..016a89812a 100644
--- a/integration_tests/_helpers.py
+++ b/integration_tests/_helpers.py
@@ -53,6 +53,8 @@
     DEFAULT_ADMIN_PASSWORD,
     DEFAULT_ADMIN_USERNAME,
     PHOENIX_ACCESS_TOKEN_COOKIE_NAME,
+    PHOENIX_OAUTH2_NONCE_COOKIE_NAME,
+    PHOENIX_OAUTH2_STATE_COOKIE_NAME,
     PHOENIX_REFRESH_TOKEN_COOKIE_NAME,
 )
 from phoenix.config import (
@@ -284,7 +286,9 @@ def log_out(self) -> None:
         _log_out(self)
 
 
-class _RefreshToken(_Token): ...
+class _RefreshToken(_Token, _CanLogOut[None]):
+    def log_out(self) -> None:
+        _log_out(self)
 
 
 @dataclass(frozen=True)
@@ -885,6 +889,9 @@ def _log_out(
 ) -> None:
     resp = _httpx_client(auth).post("auth/logout")
     resp.raise_for_status()
+    tokens = _extract_tokens(resp.headers, "set-cookie")
+    for k in _COOKIE_NAMES:
+        assert tokens[k] == '""'
 
 
 def _initiate_password_reset(
@@ -958,12 +965,7 @@ def _extract_tokens(
     if not (cookies := headers.get(key)):
         return {}
     parts = re.split(r"[ ,;=]", cookies)
-    return {
-        k: v
-        for k, v in zip(parts[:-1], parts[1:])
-        if v.strip('"')
-        and k in (PHOENIX_ACCESS_TOKEN_COOKIE_NAME, PHOENIX_REFRESH_TOKEN_COOKIE_NAME)
-    }
+    return {k: v for k, v in zip(parts[:-1], parts[1:]) if k in _COOKIE_NAMES}
 
 
 def _decode_token_ids(
@@ -973,6 +975,7 @@ def _decode_token_ids(
     return [
         jwt.decode(v, options={"verify_signature": False})["jti"]
         for v in _extract_tokens(headers, key).values()
+        if v != '""'
     ]
 
 
@@ -1000,3 +1003,11 @@ def _extract_html(msg: Message) -> Optional[bs4.BeautifulSoup]:
             content = payload.decode(part.get_content_charset() or "utf-8")
             return bs4.BeautifulSoup(content, "html.parser")
     return None
+
+
+_COOKIE_NAMES = (
+    PHOENIX_ACCESS_TOKEN_COOKIE_NAME,
+    PHOENIX_REFRESH_TOKEN_COOKIE_NAME,
+    PHOENIX_OAUTH2_STATE_COOKIE_NAME,
+    PHOENIX_OAUTH2_NONCE_COOKIE_NAME,
+)
diff --git a/integration_tests/auth/test_auth.py b/integration_tests/auth/test_auth.py
index 4d3d654d1e..2a33c691db 100644
--- a/integration_tests/auth/test_auth.py
+++ b/integration_tests/auth/test_auth.py
@@ -54,6 +54,7 @@
     _http_span_exporter,
     _initiate_password_reset,
     _log_in,
+    _log_out,
     _LoggedInUser,
     _Password,
     _patch_user,
@@ -288,6 +289,19 @@ def test_can_log_out(
             with _EXPECTATION_401:
                 logged_in_user.create_api_key()
 
+    @pytest.mark.parametrize("role_or_user", [_MEMBER, _ADMIN])
+    def test_can_log_out_with_only_refresh_token(
+        self,
+        role_or_user: _RoleOrUser,
+        _get_user: _GetUser,
+    ) -> None:
+        u = _get_user(role_or_user)
+        refresh_token = u.log_in().tokens.refresh_token
+        refresh_token.log_out()
+
+    def test_log_out_does_not_raise_exception(self) -> None:
+        _log_out()
+
 
 class TestLoggedInTokens:
     class _JtiSet(Generic[_TokenT]):
diff --git a/src/phoenix/server/api/routers/auth.py b/src/phoenix/server/api/routers/auth.py
index 83f7ba0438..05834ddb36 100644
--- a/src/phoenix/server/api/routers/auth.py
+++ b/src/phoenix/server/api/routers/auth.py
@@ -116,9 +116,19 @@ async def logout(
     request: Request,
 ) -> Response:
     token_store: TokenStore = request.app.state.get_token_store()
-    if not isinstance(user := request.user, PhoenixUser):
-        raise HTTPException(status_code=HTTP_401_UNAUTHORIZED)
-    await token_store.log_out(user.identity)
+    user_id = None
+    if isinstance(user := request.user, PhoenixUser):
+        user_id = user.identity
+    elif (refresh_token := request.cookies.get(PHOENIX_REFRESH_TOKEN_COOKIE_NAME)) and (
+        isinstance(
+            refresh_token_claims := await token_store.read(Token(refresh_token)),
+            RefreshTokenClaims,
+        )
+        and isinstance(subject := refresh_token_claims.subject, UserId)
+    ):
+        user_id = subject
+    if user_id:
+        await token_store.log_out(user_id)
     response = Response(status_code=HTTP_204_NO_CONTENT)
     response = delete_access_token_cookie(response)
     response = delete_refresh_token_cookie(response)