The Bronx is the northernmost of the five boroughs of New York City, in the U.S. state of New York. Coextensive with Bronx County, it was the last of the 62 counties of New York State to be incorporated. Located north of Manhattan and Queens, and south of Westchester County, the Bronx is the only borough that is located primarily on the mainland. According to the 2010 United States Census, the Bronx's population was 1,385,108, which increased to a Census-estimated 1,438,159 by 2014. The borough has a land area of 42 square miles (109 km²).