His farewell performance was as "Lohengrin" in 1926. In 1926, O'Mara was the first tenor to broadcast in Ireland at the opening of the new Irish radio station (Raidio 2RN – now R.T.É.). He and his wife had five children, Eileen, Nora, Power, Moya and Joey. O'Mara died in Dublin at the age of 63.