West Marsh is an area located in the northern part of Grimsby, North East Lincolnshire, England, and is close to Grimsby town centre. Its northern and eastern boundaries are formed by the Alexandra Dock. At its western edge is the Pyewipe industrial area, and at the south the railway line and Cromwell Road. West Marsh is split centrally by the southeast–northwest flow of the River Freshney. West Marsh is a ward of the North East Lincolnshire Unitary Council with a population taken at the 2011 census of 7,754.