Salo is a town in Finland, located in the southwestern interior of the country. The population of Salo is approximately 51,000, while the sub-region has a population of approximately 59,000. It is the 20th most populous municipality in Finland, and the 24th most populous urban area in the country. Salo is located in the Southwest Finland. Salo covers an area of 2,168.30 square kilometres of which 181.78 km2 is water. The population density is 25.62/km2.