The largest oil field in the U.S. is the Permian Basin.

The Permian Basin, spanning West Texas and Southeastern New Mexico, is the largest oil field in the United States. It has been a critical source of oil for many years and continues to lead the country in production. The basin is home to both conventional and unconventional oil resources, particularly shale oil. Advances in hydraulic fracturing (fracking) and horizontal drilling have unlocked vast reserves, driving a surge in production. The Permian Basin plays a crucial role in U.S. energy production, contributing significantly to the nation's oil output and energy security.