The Flemington Historic District is a historic district in Flemington, Hunterdon County, New Jersey, United States. After evaluation by the state historic preservation office (SHPO) it was listed on New Jersey Register of Historic Places (NJRHP #1587)) and the National Register of Historic Places (NRHP #80002493) in 1980. One has been documented by the Historic American Buildings Survey (HABS).
Among the contributing properties (CP) are: Union Hotel - Early 19th century hotel in downtown Flemington that served as a restaurant until its 2008 closure. The current structure dates to 1877, built on the site of what had been a stagecoach stop that dates to 1814. Hunterdon County Courthouse - Historic court house where the Lindbergh Trial took place. Now used for County offices. Fleming Castle / Samuel Fleming House - First house in Flemington, 5 Bonnell Street. Purchased by the Borough of Flemington in 2005 and operated as a historical museum by the Friends of Fleming Castle.