Roger Vaughan may refer to:Sir Roger Vaughan of Bredwardine, Welsh knight, killed at the Battle of Agincourt Sir Roger Vaughan of Tretower, Welsh knight, son of the above Sir Roger Vaughan of Porthamal, Welsh knight, MP for Breconshire, 1553–1562, 1571, and Brecon, 1562–1567 Roger Vaughan, Welsh MP for Radnorshire, 1572 Roger Vaughan (c. 1641–1672), English politician and courtier, MP for Hereford, 1662–1673 Roger Vaughan (bishop) (1834–1883), English Benedictine monk of Downside Abbey and Roman Catholic Archbishop of Sydney, 1877–1883