John Blennerhassett (died 4 December 1677) was an Anglo-Irish member of the Irish House of Commons.
He was probably born at Ballycarty Castle, County Kerry, where his family owned a large estate.
[citation needed] He served as High Sheriff of Kerry in 1658.
He married Elizabeth Denny in 1654, with whom he had three children, including the MP John Blennerhassett.
This article about a Member of the Parliament of Ireland (up to 1800) is a stub.