Cincinnati is a city in and the county seat of Hamilton County, Ohio, United States. Settled in 1788, the city is located at the northern side of the confluence of the Licking and Ohio rivers, the latter of which marks the state line with Kentucky. The city is the economic and cultural hub of the Cincinnati metropolitan area and with an estimated population of 2,265,051, it is Ohio's largest metropolitan area and the nation's 30th-largest city.