Captain Hildebrand Alington, 5th Baron Alington of Killard (3 August1641 - 11 February 1722/23) was an Irish peer, the son of William Alington, 1st Baron Alington of Killard. He succeeded to the title 3rd Baron Aldenham on 18 September1691, on the death of his elder brother, the 4th Baron who had died without male issue.
He never married, and on his death the Barony Alington of Killard became extinct.