Sauvo (Finnish pronunciation:[ˈsɑuʋo]; Swedish:Sagu) is a municipality of Finland.
It is located in the province of Western Finland and is part of the Southwest Finland region. The municipality had a population of 2,996 (30 June 2015) and covers an area of 299.71 square kilometres (115.72sqmi) of which 47.21km (18.23sqmi) is water. The population density is 11.87 inhabitants per square kilometre (30.7/sqmi).