The Southwest region of the U.S., especially Texas, is known for its large oil reserves.

The Southwest, particularly Texas and parts of New Mexico, is home to some of the largest oil reserves in the United States. The region is crucial to the nation's oil production, with major oil fields like the Permian Basin, one of the most significant and productive areas for oil extraction globally. The discovery of oil in the early 20th century transformed the economy of Texas, making it a key player in the global energy market, with ongoing exploration and drilling efforts ensuring its continued significance.