The Concordia Mill is a former gristmill on Cedar Creek located in Hamilton, Wisconsin, United States. The limestone mill was built in 1853 by Edward H. Janssen and his brother, Theodore, along with a Mr. Gaitsch with locally quarried limestone. In 1881, the mill's dam washed out during heavy spring flooding and was rebuilt sometime later. The mill operated until World War II when it was converted into a distillery that operated for several years. On April 26, 1974, it was added to the National Register of Historic Places, and the surrounding area, known as the Hamilton Historic District was added to the NRHP two years later.