Robert Aston Coffin CSsR (19 July 1819 – 6 April 1885) was an English Redemptorist and Bishop of Southwark (25 May 1882 – 6 April 1885). Coffin was born at Brighton and educated at Harrow School and at Christ Church, Oxford (BA 1841, MA 1843). In 1843 he became vicar of St. Mary Magdalene, Oxford, but resigned two years later, and was received into the Roman Catholic Church on 3 December 1845. For a year after this he resided with Ambrose Lisle Phillips at Grace Dieu manor, and then he went with John Henry Newman to Rome, where he was ordained priest in 1847.