Asfar ibn Shiruya (Gilaki/Persian: اسفار بن شیرویه: died 931) was an Iranian military leader of Gilaki origin, active in northern Iran (esp. Tabaristan and Jibal) in the early 10th century. He played a major role in the succession disputes of the Alids of Tabaristan, and managed to establish himself as the ruler of Tabaristan and northern Jibal briefly from 928 to 930.