Perniö (; ) is a former municipality of Finland. It was consolidated with Salo 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 6,026 (2004-12-31) and covered an area of 407.79 km² (excluding sea) of which 9.91 km² is inland water. The population density was 15.15 inhabitants per km². The municipality was unilingually Finnish. External links http://www.pernio.fi/ – Official website Former municipalities of Finland Salo, Finland Populated places disestablished in 2009 2009 disestablishments in Finland