Wyoming has the largest coal reserves in the U.S., mainly found in the Powder River Basin.

Wyoming holds the largest coal reserves in the United States, with the majority of its coal found in the Powder River Basin, one of the most significant coal-producing regions in the world. This region is known for its low-sulfur coal, which is highly valued for electricity generation due to its cleaner-burning properties compared to higher-sulfur coal. Despite the decline in coal use across the nation, Wyoming's vast coal reserves continue to play a major role in the energy sector, supplying both domestic and international markets. The state’s coal production remains a cornerstone of its economy and energy infrastructure.