Maurice Herbert Towneley Towneley-O'Hagan, 3rd Baron O'Hagan (20 February 1882 – 18 December 1961), was a British Liberal and later Conservative politician. O'Hagan was the second son of Thomas O'Hagan, 1st Baron O'Hagan, the Liberal Lord Chancellor of Ireland in Gladstone's first two governments; and his second wife Alice Mary, daughter and co-heiress of Colonel Charles Towneley; and he succeeded in the barony on the death of his elder brother in 1900, when he was still eighteen. He was educated at Marlborough College and Trinity College, Cambridge.