Apia is the capital and largest city in Samoa. It lies in the central north coast of Upolu Island, the largest of the four main inhabited islands of Samoa. The combined land area of Samoa is estimated at 2,935 km2. In 2006 the Apia urban area constituted 21% of the total population (Population and Housing Census) with a continued increase in growth due to improved social and economic services, an efficient transportation system and sale of government land.