Edmund Butler, 11th Viscount Mountgarret (27 July 1745 – 16 July 1793) was an Irish peer and politician.
He was the son of Edmund Butler, 10th Viscount Mountgarret and Charlotte Bradstreet, daughter of Sir Simon Bradstreet, 1st Bart. He married Henrietta Butler, daughter of Somerset Hamilton Butler, 1st Earl of Carrick on 7 October 1768 and had issue. He was a member of parliament (MP) in the Irish House of Commons for County Kilkenny from 1776 to 1779.