Stonefield, located at 12195 County Road VV outside Cassville, Wisconsin, United States, was the estate of Wisconsin's first governor, Nelson Dewey. Much of the original estate has been separated into Nelson Dewey State Park and the Stonefield historic site, an expansive museum operated by the Wisconsin Historical Society. The historic site takes advantage of the large property by offering several different areas for visitors, including an early Wisconsin farmhouse, a re-created agricultural village built to resemble those common around 1900, and a reconstruction of Nelson Dewey's home. Stonefield is also home to the Wisconsin State Agricultural Museum, which features a large collection of antique farm equipment.