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About Franklin, NJ

See also: Franklin Township, New Jersey; Franklin Lakes, New Jersey Franklin is a borough in Sussex County, New Jersey, United States. As of the 2010 United States Census, the borough's population was 5,045 reflecting a decline of 115 (-2.2%) from the 5,160 counted in the 2000 Census, which had in turn increased by 183 (+3.7%) from the 4,977 counted in the 1990 Census. Franklin, known as the "Fluorescent Mineral Capital of the World," is located over a rich ore body containing more than 150 minerals, many of them fluorescent and 25 of which are found nowhere else on earth. Settled in the 17th century, the village known as Franklin Furnace after Benjamin Franklin, developed near iron mines and iron smelting operations located along the Wallkill River. In the early 19th century, zinc deposits in the area began to be developed commercially.