Uusimaa is an electoral district represented in the Finnish Eduskunta (parliament). It covers the administrative region of Uusimaa, excluding the capital city of Helsinki, which forms its own constituency (see Helsinki (electoral district)). Uusimaa currently elects 35 members of the Eduskunta, which makes it the largest electoral district.
Even though the city proper is not part of the constituency, much of the area falls under the Greater Helsinki metropolitan area. The suburban cities Espoo and Vantaa account for half of its population of 1 million. The largest party in the 2011 election was the National Coalition Party, with the Social Democratic Party second. The Green League and Swedish People's Party gain vote share in excess of their national average.