Paduka Sri Sultan Mahmud Shah I ibni al-Marhum Sultan Muzzil Shah (Jawi: ڤدوك سري سلطان محمود شاه ١ ابن المرحوم سلطان مزعل شاه; died 22 May 1321) was the fifth Sultan of Kedah and reigned from 1280 to 1321. He ordered the construction of Kota Seputih and Kota Di Hulu Sungai Merpah as a fortress from the Tenasserim tribe.
| Mahmud Shah I محمود شاه ١ | |
|---|---|
| Sultan of Kedah | |
| Reign | 24 August 1280 – 22 May 1321 |
| Predecessor | Muzzil Shah |
| Successor | Ibrahim Shah |
| Died | 22 May 1321 Istana, Kota Sungai Mas |
| Burial | Kota Sungai Mas Royal Cemetery |
| Spouse | Tunku Aisha |
| Issue | Sultan Ibrahim Shah Tunku Azlin Tunku Putri Zubaida |
| House | Kedah |
| Father | Muzzil Shah |
| Religion | Sunni Islam |