Bernardsville is the northernmost borough in Somerset County, in the U.S. state of New Jersey. Situated within the heart of the Raritan Valley and Somerset Hills regions, the borough is an historic and wealthy bedroom community of New York City in the New York metropolitan area. As of the 2020 United States census, the borough's population was 7,893, an increase of 186 from the 2010 census count of 7,707, which in turn had reflected an increase of 362 from the 7,345 counted at the 2000 census.