Sussex County is the northernmost county in the State of New Jersey. Its county seat is Newton. It is part of the New York Metropolitan Area and is part of the state's Skylands Region, a term promoted by the New Jersey Commerce, Economic Growth, & Tourism Commission to encourage tourism. As of the …
The Westbrook-Bell House in Sandyston Township is the oldest house still-standing in Sussex County, built by Dutch settler Johannes Westbrook in the early 18th century.
The Franklin Furnace mines and processing plant of the New Jersey Zinc Company in Franklin Borough (circa 1890–1901). Zinc mining brought thousands of Irish, South American, and Eastern European immigrants to Sussex County in the late 19th and early 20th centuries.
The "Black Dirt Region" is a 26,000-acre (10,400 ha) area shared by Sussex County and Orange County, New York along the banks of Wallkill River. Known as the "Drowned Lands" in the 19th century, this region's highly organic muck soil supports local vegetable and sod farming, and onion farming at its height reported crop yields of 30,000 pounds per acre (4,800 kg/ha).
The old Sussex County Courthouse (right) and the Newton Town Green (left) were surveyed in 1761 by Jonathan Hampton who donated land to the new county. The original stone building, erected in 1762–1765, was expanded to its current size in 1844. Today it houses the offices and court of the County Surrogate.