Mount Holly is a
township in
Burlington County,
New Jersey, United States. It is the
county seat of Burlington County as well as an eastern suburb of
Philadelphia. As of the
2010 United States Census, the township's population was 9,536, reflecting a decline of 1,192 (-11.1%) from the 10,728 counted in the
2000 Census, which had in turn increased by 89 (+0.8%) from the 10,639 counted in the
1990 Census. Mount Holly also gives its name to the
National Weather Service's Weather Forecast Office for the
Philadelphia metropolitan area, though the office is actually located in adjacent
Westampton.