The primary source of natural gas in the United States is shale.

Shale is the leading source of natural gas in the U.S., thanks to advancements in hydraulic fracturing (fracking) and horizontal drilling techniques. These innovations have made it possible to extract large quantities of natural gas from deep shale rock formations such as the Marcellus, Barnett, and Eagle Ford Shales. Shale gas has become a key driver of U.S. energy production, reducing the country’s reliance on coal and increasing energy security. This shift to natural gas has also contributed to a decrease in greenhouse gas emissions from power generation.