Iron mining at Pilot Knob and Iron Mountain gave the county its name

Iron County is named for iron ore. In the 1800s, that ore brought mining and industry here. The most famous spots were Pilot Knob and Iron Mountain, just to the south. (Ore is rock that holds metal.) The ore came from the area’s igneous geology. Igneous rock forms from cooled, melted rock deep in the earth. The ore fed mines and furnaces. It also fed the rail line that linked the area toward St. Louis. This is a big reason towns like Ironton, Pilot Knob, and Arcadia grew where they did. Mining rose and fell over the years. It is not the big industry it once was. But the place names and worked-over hills still tell the story. Want to dig into the county’s history? The State Historical Society of Missouri and the Missouri Geological Survey are good places to start. Confirm any exact dates, tonnages, or “first/largest” claims against official records.