Siyaka (IAST: Siyaka; reigned c. 949-972), also known as Harsha (IAST: Harsa), was the king of Malwa, who ruled in west-central India. He appears to have been the first independent ruler of the Paramara dynasty.

Siyaka is the earliest Paramara ruler known from his own inscriptions, which have been discovered in present-day Gujarat, and suggest that he was once