John Manwaring Steward (1874–1937) was the fifth Anglican Bishop of Melanesia, serving from 1919 to 1928.
He was the son of Charles Edward Steward, also an Anglican priest.
Steward was elected Bishop of Melanesia after 17 years of missionary work as a priest in the Melanesian Mission, which he joined in 1902.
In 1925 he assisted Ini Kopuria in the formation of the Melanesian Brotherhood, a group of evangelists with a common rule of life.
Steward is listed in the Calendar of saints (Church of the Province of Melanesia).