Remarkable Ohio


Below is a complete listing of all Ohio Historical Markers. To find a detailed marker listing including text, photographs, and locations, click on a county below. Our listing is updated by the markers program as new markers are installed and older markers are reported damaged or missing.

ALERT: Marker removed in 2022. Awaiting decision to retire or replace.

3-40 Jefferson Furnace

Side A: Founded by a group of immigrant Welsh businessman in 1853, Jefferson Furnace was a noted charcoal furnace in the Hanging Rock region of southern Ohio. The iron produced here was well regarded and used at the United States Arsenal at Harper’s Ferry, Virginia (now West Virginia). Local tradition holds that during the Civil War, iron from Jefferson Furnace was also used on the Union ironclad U.S.S. Monitor. Jefferson Furnace was one of the last operating charcoal furnaces in Ohio when it closed in 1916.
Side B: Same
Sponsors: Ohio Bicentennial Commission, The Longaberger Company, The Welsh Societies of Southeast Ohio, and The Ohio Historical Society
Address: State Route 279, Jackson Lake State Park, 
Oak Hill, 
Location: At entrance to shelter house parking, S of OH 279 on W side of lake
Latitude: 38.8927460
Longitude: -82.5995830