John Barrett (died 1693) was a colonel and head of the barony of the Cork Barrett family. Col. Barrett is noted for raising a regiment of infantry for King James' army in Ireland. In 1691 the Williamite confiscation deprived Barrett, the head of the family at that time, of . He was killed in the French service at the Battle of Landen, alongside fellow Jacobite Patrick Sarsfield, in 1693.