Kauniainen is a town in Finland, located in the southern interior of the country. Kauniainen is situated in the southern part of the Uusimaa region, and it is enclaved by the City of Espoo. The population of Kauniainen is approximately 10,000. It is the 95th most populous municipality in Finland. Kaunianen is part of the Helsinki Metropolitan Area, which has approximately 1.58 million inhabitants.

Uusimaa is a region of Finland. It borders the regions of Southwest Finland, Tavastia Proper (Kanta-Häme), Päijänne Tavastia (Päijät-Häme), and Kymenlaakso. Finland's capital and largest city, Helsinki, along with the surrounding metropolitan area, are both contained in the region, and Uusimaa is Finland's most populous region. The population of Uusimaa is 1,734,000.