Owen MacCarthy Reagh (Irish: Eoghan Mac Carthaigh Riabhach) (1520–1594) was the 16th Prince of Carbery from 1576 to 1593. He belonged to the MacCarthy Reagh dynasty. Owen was commonly referred to as "Sir" Owen MacCarthy (McCartie) in the English court records. He was succeeded by the son of his brother Cormac na Haoine, Donal of the Pipes, 17th Prince of Carbery.