Giles Alington, 4th Baron Alington of Killard (4 October 1680-18 September 1691) was an Irish peer, the son of William Alington, 3rd Baron Alington of Killard. He succeeded to the titles 2nd Baron Alington of Wymondley, Hertfordshire and 4th Baron Alington of Killard, Co. Cork on 1 February 1684/85.
He never married, and on his death the Barony Alington of Killard passed to his uncle, and the Barony Alington of Wymondley became extinct.