Philadelphia (/ˌfɪləˈdɛlfiə/) is the largest city in the Commonwealth of Pennsylvania and its only consolidated city-county, the fifth-most-populous city in the United States, and the core of the sixth-largest metropolitan area in the country. Located in the Northeastern United States at the confluence of the Delaware and Schuylkill rivers, Philadelphia is the economic and cultural center of the Delaware Valley. The population of the city was counted at 1,526,006 in 2010 and estimated at 1,560,297 in 2014, according to the United States Census Bureau.