Lincoln Park is a borough in Morris County, in the U.S. state of New Jersey. As of the 2020 United States census, the borough's population was 10,915, an increase of 394 from the 2010 census count of 10,521, which in turn reflected a decline of 409 from the 10,930 counted in the 2000 census. Lincoln Park was incorporated as a borough by an act of the New Jersey Legislature on March 11, 1922, from portions of Pequannock Township. The borough was reincorporated on February 26, 1925.