Flemington is a borough in Hunterdon County, New Jersey, United States. As of the United States 2010 Census, the borough population was 4,581. It is the county seat of Hunterdon County.. Most of the borough is in the Amwell Valley (a low-lying area of the Newark Basin), but northwest portions of the borough sit on the Hunterdon Plateau.
By 1980, 65% of Flemington borough had been included on the New Jersey State Register of Historic Places and is now on the National Register of Historic Places.
- Union Hotel - Early 19th century hotel in downtown Flemington. Served as a restaurant until its 2008 closure.
- Hunterdon County Courthouse - Historic court house where the Lindbergh Trial took place. Now used for County offices.
- Fleming Castle - Historic house