Wyoming stands as the largest coal-producing state in the United States by an overwhelming margin, consistently accounting for roughly forty percent or more of total annual domestic coal production. This dominance is driven largely by the prolific Powder River Basin located in the northeastern part of the state, where massive surface-mining operations extract thick, low-sulfur sub-bituminous coal seams with high operational efficiency. Other major coal-producing states include West Virginia, Pennsylvania, Illinois, and Kentucky, though Wyoming remains far ahead in total short tons mined.