Mahmud bin Kuchuk (died 1466) was Khan of the Great Horde from 1459 to 1465 (succeeding Kuchuk Muhammad and preceding Ahmed Khan bin Kuchuk) and Khan of the Astrakhan Khanate from 1465 to 1466 (preceding Qasim I). He briefly ruled over the Great Horde before Ahmed Khan overthrew him, upon which he established the Astrakhan khanate at Hajji Tarkhan. He died in 1466.