Before the Conquest, King Edward probably had a manor here. Snaith was on the northern edge of the huge Hatfield Chase, a fenny hunting ground.
Gerard, archbishop of York (1101-08), granted the church of St Lawrence and the soke of Snaith to Selby Abbey. The church became a small cell of the Abbey. It was appropriated to Selby Abbey in 1310 (VCH Yorkshire III, 100-101; 150).
Much of the priory garth was taken for the railway which runs on the N edge of the town between the church and the river Aire.
The dedication is said by Lawton to be to St Mary, and Raine (1873) agrees, but the VCH Yorkshire III, 100, n.1, says that this is an error, and that it was St Lawrence.