North Berwick is a town in York County, Maine, United States. The population was 4,576 at the 2010 census.North Berwick is part of the Portland - South Portland - Biddeford, Maine metropolitan statistical area.HistoryOriginally a part of Kittery called Kittery Commons, the area was first settled in 1693 by John Morrell, a Quaker who built a log cabin on Wells Street. It was set off from Kittery in 1713 as part of Berwick, named for Berwick-upon-Tweed on the Anglo-Scottish border. Doughty Falls in the Great Works River provided water power for a sawmill, gristmill and carding mill. After the Revolutionary War, the small mill town grew rapidly. It was set off and incorporated as North Berwick on March 22, 1831. The town was named after Berwick, England.