Flemington is a Borough in Hunterdon County, New Jersey, United States. As of the United States 2000 Census, the borough population was 4,201. 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. What is now Flemington was originally formed as a town by an Act of the New Jersey Legislature on March 14, 1870, within portions of Raritan Township. It became a village as of June 11, 1894, still within Raritan Township. Flemington was finally incorporated as an independent borough by an Act of the New Jersey Legislature on April 7, 1910, based on the results of a referendum held on April 26, 1910, and was formally separated from Raritan Township. The borough's incorporation was confirmed on April 27, 1931. Flemington is an independent municipality located entirely within (and completely surrounded by) Raritan Township and is located near the geographic center of the Township. In 1756, Samuel Fleming purchased part of this land, and built his home which still stands on Bonnell Street, and "Fleming's Town" was born.