Westbrook is a city in Cumberland County, Maine, United States and a suburb of Portland. It is part of the PortlandSouth PortlandBiddeford, Maine metropolitan statistical area. The Oxford & Cumberland Canal opened in 1832, connecting Portland to Harrison by way of Westbrook and Sebago Lake. It was the primary commercial shipping route for goods until 1871, when it was rendered obsolete by the Portland and Ogdensburg Railroad. Remnants of the canal can still be seen throughout the city, including Beaver Pond, along Stroudwater Street near the Maine Turnpike overpass, and in the woods between Westbrook High School and Oxford & Cumberland Canal Elementary School.