Southwest Middlesex is a municipality in Middlesex County, Ontario, Canada.The restructured municipality of Southwest Middlesex was incorporated on January 1, 2001. This amalgamation joined the Village of Glencoe and the Village of Wardsville with the Townships of Ekfrid and Mosa. Southwest Middlesex had a population of 5,860 in the Canada 2011 Census. Southwest Middlesex is located in the southwest corner of Middlesex County, about halfway between London and Chatham.CommunitiesThe township includes the communities of Appin, Ekfrid, Glencoe, Lewis Corners, Macksville, Mayfair, Newbury Station, North Appin Station, North Ekfrid, North Glencoe Station, Riverside, Strathburn, Tate Corners, Wardsville and Woodgreen. It surrounds, but does not include, the independent village of Newbury.Wardsville was the site of the Battle of Longwoods during the War of 1812.DemographicsPopulation trend:  Population in 2006: 5890 Population in 2001: 6144 Population total in 1996: 6204