Roxbury is a township in western Morris County, in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 22,950, The township is located approximately west-northwest of New York City, west-northwest of Newark, New Jersey and east of the Delaware Water Gap on the border of New Jersey and Pennsylvania.
Roxbury was formed on December 24, 1740, from portions of Morris Township. It was formally incorporated by the Township Act of 1798 of the New Jersey Legislature on February 21, 1798, as part of the state's initial group of 104 townships. Portions of the township were taken to form Mendham Township (March 29, 1749), Washington Township (April 2, 1798), Chester Township (April 1, 1799), Jefferson Township (February 11, 1804), Mount Olive Township (March 22, 1871), Mount Arlington (November 3, 1890) and Netcong (October 23, 1894).
Geography
According to the United States Census Bureau, the township had a total area of 21.98 square miles (56.93 km<sup>2</sup>), including 20.85 square miles (54.01 km<sup>2</sup>) of land and 1.13 square miles (2.93 km<sup>2</sup>) of water (5.14%). Previously, as of the 2000 United States census, the Succasunna and Kenvil communities had been consolidated as Succasunna-Kenvil,
Other unincorporated communities, localities and place names located partially or completely within the township include Baker Mill Pond, Bertrand Island, Carys, Lake Junction, Lake Rogerene, Port Morris Landing, Rustic and Shippenport.
Roxbury borders the municipalities of Chester Township, Jefferson Township, Mine Hill Township, Mount Arlington, Mount Olive Township, Netcong, Randolph Township, Wharton in Morris County; and both Hopatcong and Stanhope in Sussex County.