The Appalachian Mountains region is home to the largest number of coal mines in the U.S., particularly known for its high-quality bituminous coal.

The Appalachian region, which stretches from Alabama to Pennsylvania, has long been a major coal-producing area in the U.S. It is rich in both surface and underground coal reserves, particularly in states like West Virginia, Kentucky, and Virginia. Coal mining in this region has been a crucial part of the local economy, though it has been facing challenges due to the decline in coal demand, environmental regulations, and competition from natural gas and renewable energy sources.