Mynämäki (Finnish pronunciation:[ˈmynæˌmæki]) (swe. Virmo) is a municipality of Finland located in the Southwest Finland region.
The municipality has a population of 7,893 (30 June 2015) and covers an area of 536.08 square kilometres (206.98sqmi) of which 16.37km (6.32sqmi) is water. The population density is 15.19 inhabitants per square kilometre (39.3/sqmi). The municipality is unilingually Finnish.