Hunterdon County is a county located in the western section of the U.S. state of New Jersey. As of the 2010 United States Census, the population was 128,349, increasing by 6,360 (+5.2%) from the 121,989 counted in the 2000 Census, retaining its position as the state's 14th-most populous county; The percentage increase since 2000 was the largest in New Jersey, almost triple the statewide increase of 4.5%, and the absolute increase in residents was the third highest. It is part of the New York Metropolitan Area. Its county seat is Flemington.