Lemu (Finnish pronunciation: [ˈlemu]; Swedish: Lemo) is a former municipality of Finland and an old church parish dating to the Middle Ages. Together with Askainen, the municipality was consolidated with Masku on January 1, 2009.

It is located in the province of Western Finland and is part of the Southwest Finland region. The municipality had a population of 1,603 (2004-12-31) and covered an area of 47.25 km (18.24 sq mi) (excluding sea) of which 0.11 km (0.04 sq mi) is inland water. The population density was 34.01 inhabitants per km (88/sq mi).

The municipality was unilingually Finnish.

• Battle of Lemo

Media related to Lemu at Wikimedia Commons

• Municipality of Lemu – Official website (in Finnish)

60°34′10″N 21°58′05″E / 60.56944°N 21.96806°E / 60.56944; 21.96806