Manhattan is a city located in the northeastern part of the state of Kansas in the U.S., at the junction of the Kansas River and Big Blue River. It is the county seat of Riley County and the city extends into Pottawatomie County. As of the 2010 census, the city population was 52,281. It is the principal city of the Manhattan, Kansas Metropolitan Statistical Area – with an estimated population of 113,629, the Manhattan MSA is the fourth largest metropolitan area in the state.Nicknamed The Little Apple in 1977 as a play on New York City's "Big Apple", it is best known for being the home of Kansas State University and has a distinct college town feel. Eight miles (13 km) west of the city is Fort Riley, a United States Army post.In 2007, CNN and Money magazine rated Manhattan as one of the ten best places in America to retire young. The town was named an All-American City in 1952, becoming the first city in Kansas to win the award.