Millburn is a township in Essex County, New Jersey, United States. As of the United States 2000 Census, the township population was 19,765. Millburn Township was created as a township by an act of the New Jersey Legislature on March 20, 1857, from portions of Springfield Township. Millburn also includes the hamlet of Short Hills. Millburn comprises the historic Wyoming district, and South Mountain and Millburn Center areas. Short Hills contains the sections of Knollwood, Glenwood, Brookhaven, Country Club, Merrywood, Deerfield-Crossroads, Mountaintop, White Oak Ridge, and Old Short Hills Estates. Millburn is near South Mountain Reservation, The Mall at Short Hills and the suburban towns of South Orange, Maplewood, Livingston, and Summit. Millburn is also home to the Paper Mill Playhouse, a 70-year-old regional theater. New Jersey Monthly magazine ranked Millburn as the 53rd best place to live in New Jersey in its 2008 rankings of the "Best Places To Live" in New Jersey. Millburn also has the dubious distinction of having the highest annual property tax rate in the US. In 2009, it was $19,097.