David Barry, 1st Earl of Barrymore

David Barry, 1st Earl of Barrymore (1605–1642), 6th Viscount Buttevant from 1617 to 1628, was a Protestant native Irish peer.

The Barrys were an Old English family who had come from Wales at the time of the Anglo-Norman invasion of Ireland.

Through Cork's influence, he was created Earl of Barrymore on 28 February 1628 In 1631 Buttevant, as he was now, married Alice Boyle, daughter of Richard Boyle, 1st Earl of Cork, by his second wife, Catherine Fenton.

On 10 May 1642, he stormed the Castle of Ballymacpatrick (now Careysville), near Fermoy, which was held by his grand-aunt, and hanged forty of the rebel leaders before breakfast.

He died two weeks later on 29 September 1642 at his house in Castle Lyons probably of wounds received at the battle.