Mount Holly, New Jersey

Mount Holly is a township that is the county seat of Burlington County in the U.S. state of New Jersey. It is an eastern suburb of Philadelphia, the nation's sixth largest city as of 2020. As of the 2020 United States census, the township's population was 9,981, an increase of 445 (+4.7%) from the 2010 census count of 9,536, which in turn reflected a decline of 1,192 (-11.1%) from the 10,728 counted in the 2000 census. The township, and all of Burlington County, is a part of the Philadelphia-Reading-Camden combined statistical area and the Delaware Valley.

What is now Mount Holly was originally formed as Northampton on November 6, 1688. Northampton was incorporated as one of New Jersey's initial group of 104 townships created by an act of the New Jersey Legislature on February 21, 1798. Portions of the township were taken to form Little Egg Harbor Township (February 13, 1740, now part of Ocean County), Washington Township (November 19, 1802), Pemberton borough (December 15, 1826), Coaxen Township (March 10, 1845, now known as Southampton Township), Pemberton Township (March 10, 1846), Westampton Township (March 6, 1850) and Lumberton Township (March 14, 1860). There had been a Mount Holly post office since before the 1870 U.S. Census. The township was renamed Mount Holly as of November 6, 1931, based on the results of a referendum held three days earlier. The township was named for the prominent hill just north of downtown partially covered with holly trees. Some areas of today's Mount Holly were known as Bridgetown.

Mount Holly gives its name to the National Weather Service Weather Forecast Office for the Philadelphia metropolitan area, serving most of New Jersey, Southeastern Pennsylvania, all of Delaware and Eastern Maryland, though the office is actually located in adjacent Westampton.