Espoo is the second largest city and municipality in Finland. The population of the city of Espoo is 252 000. It is part of the Helsinki Metropolitan Area along with the cities of Helsinki, Vantaa, and Kauniainen. Espoo shares its eastern border with Helsinki and Vantaa, while enclosing Kauniainen. Espoo is the only municipality in Finland to fully enclose another municipality. The city is on the shore of the Gulf of Finland, in the region of Uusimaa.