The Quincy Smelter, also known as the Quincy Smelting Works, is a former copper smelter located on the north side of the Keweenaw Waterway in Ripley, Michigan. It is a contributing property of the Quincy Mining Company Historic District, a National Historic Landmark District. The smelter was built in 1898 by the Quincy Mining Company, operating from 1898 to 1931 and again from 1948 to 1971. The smelter was part of a Superfund site from 1986 to 2013.