Bernardsville () is the northernmost borough in Somerset County, New Jersey, United States. 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 (+2.4%) from the 2010 census count of 7,707, which in turn had reflected an increase of 362 (+4.9%) from the 7,345 counted at the 2000 census. Bernardsville is often mispronounced as "Ber-NARDS-ville" as opposed to the correct pronunciation, "BER-nards-ville".
Bernardsville was incorporated as a borough by an act of the New Jersey Legislature on March 6, 1924, from portions of Bernards Township, based on the results of a referendum held on April 29, 1924. The borough was named for Sir Francis Bernard, 1st Baronet, who served as governor of the Province of New Jersey before the Revolutionary War. In 2009, part of the borough was listed on the National Register of Historic Places as the Olcott Avenue Historic District.