Vihti is a municipality in Finland, located in the southern interior of the country. Vihti is situated in the Uusimaa region. The population of Vihti is approximately 29,000. It is the 37th most populous municipality in Finland. Vihti 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.