Stillwater Township, New Jersey

Stillwater Township is a township located in Sussex County, in the U.S. state of New Jersey. Situated in the Kittatinny Valley, Stillwater is a rural farming community with a long history of dairy farming. As of the 2020 United States census, the township's population was 4,004, a decrease of 95 (−2.3%) from the 2010 census count of 4,099, which in turn reflected a decrease of 168 (−3.9%) from the 4,267 counted in the 2000 census.

Stillwater was settled in the eighteenth century by Palatine German immigrants who entered through the port of Philadelphia. In 1741, Casper Shafer, John George Wintermute (Windemuth), and their father-in-law Johan Peter Bernhardt settled along the Paulins Kill. For the next 50 years, the village of Stillwater was essentially German, centered on a union church shared by Lutheran and German Reformed (Calvinist) congregations. The German population assimilated by the early nineteenth century, but evidence of their settlement remains in the architecture of the grist mills, lime kilns, and stone houses located throughout the valley. Stillwater was incorporated as a township by an act of the New Jersey Legislature on December 27, 1824, from portions of Hardwick Township when Sussex County was divided in half by the legislature a few weeks earlier to create Warren County. Portions of the township were taken to form Fredon Township on February 24, 1904.

In 2008, New Jersey Monthly magazine ranked Stillwater Township as its 40th best place to live in its annual rankings of the "Best Places To Live" in New Jersey.