The Ohio River flows south of Cincinnati, Ohio. This river separates the city from Covington, Kentucky. Cincinnati became the first major inland city in the United States due to its rapid population growth in the 19th century.
Cincinnati is the third-largest city in Ohio, based on the 2010 U.S. Census. Approximately 297,517 people live in Cincinnati, based on 2013 estimates. The city is located on 79.54 square miles along the north bank of the Ohio River, with the downtown area located on the shore of the river. It is in Hamilton County, the most southwestern county of Ohio. Cincinnati was settled in 1788 and was incorporated as a city in 1819.