John Manwaring Steward (1874–1937) was the fifth Anglican Bishop of Melanesia, serving from 1919 to 1928. From 1924 he was assisted by Merivale Molyneux as assistant bishop. He was the son of Charles Edward Steward, also an Anglican priest. J.M. Steward was elected Bishop of Melanesia after 17 years of missionary work as a priest in the Melanesian Mission, which he joined in 1902.