Lempäälä (Swedish: Lembois) is a municipality in southwestern Finland with 22,560 inhabitants (31 March 2016). Lempäälä is located south of the city of Tampere. The municipality covers an area of 307.07 square kilometres (118.56 sq mi) of which 37.51 km2 (14.48 sq mi) is water. The population density is 83.69 inhabitants per square kilometre (216.8/sq mi). The municipality center of Lempäälä is situated on an isthmus between the lakes Vanajavesi and Pyhäjärvi which are connected by the Kuokkalankoski rapids and the canal of Lempäälä that was built during the 1870s and is still in use.