Illinois Iron Furnace

The Illinois Iron Furnace is a limestone blast furnace located within Shawnee National Forest near Hardin County, Illinois. The structure contains a furnace chamber built according to 19th-century iron production methods and stands as a physical example of industrial technology from that era.

Construction began in 1837 and took two years to complete, with the furnace then operating for decades in the region. The site ceased operations in 1883 after supporting local industry through much of the 19th century.

The furnace represents the industrial advancement of Illinois during the 19th century, marking the development of local manufacturing capabilities.

The site is accessible by foot through walking trails and equipped with informational signs explaining its industrial past. Plan to spend time outside, as the structure sits in an open forest setting and weather conditions vary throughout the year.

This structure remains the last standing iron furnace in Illinois, producing nine tons of iron daily during its operational peak.

Location: Hardin County

GPS coordinates: 37.49940,-88.32810

Latest update: December 12, 2025 17:40