Jefferson Township is the northernmost township in Morris County, New Jersey, United States. As of the 2010 United States Census, the township's population was 21,314, having increased by 1,597 (+8.1%) from the 19,717 counted in the 2000 Census, which had in turn increased by 1,892 (+10.6%) from the 17,825 counted in the 1990 Census.
Jefferson Township was formed as a township by an act of the New Jersey Legislature on February 11, 1804, from portions of Pequannock Township and Roxbury Township. The township was named after Thomas Jefferson, the President of the United States at the time the Township was created.
- Jefferson Township, New Jersey on Wikipedia