Texas oil refers to the vast petroleum resources found in the state of Texas, which has been a significant player in the oil industry since the early 20th century. The discovery of oil at Spindletop in 1901 marked the beginning of the Texas oil boom, leading to rapid economic growth and the establishment of major oil companies. Today, Texas remains the leading oil-producing state in the United States, contributing a substantial portion of the nation's crude oil output. The state's oil industry is characterized by a mix of large corporations and independent producers, with key regions including the Permian Basin and the Eagle Ford Shale.