Leamington is a municipality in Essex County, Ontario, Canada. With a population of 29,680 in the Canada 2021 Census, it forms the second largest urban centre in Windsor-Essex County after Windsor, Ontario. It includes Point Pelee National Park, the southernmost point of mainland Canada. Known since the 20th century as the "Tomato Capital of Canada", it is the location of a tomato processing plant owned by Highbury-Canco; founded in 1908, the plant was owned until 2014 by the H. J. Heinz Company.