John Blennerhassett (died 1677)

John Blennerhassett (died 4 December 1677) was an Anglo-Irish member of the Irish House of Commons.

Blennerhassett was the son of Captain John Blennerhassett and Martha Lynn. He was probably born at Ballycarty Castle, County Kerry, where his family owned a large estate. He was the brother of Robert Blennerhassett.

He served as High Sheriff of Kerry in 1658. He was elected as Member of Parliament for Tralee in 1661. He married Elizabeth Denny in 1654, with whom he had three children, including the MP John Blennerhassett.