More State Ranking Tables › Notes & Sources Consumption. Total Energy per Capita: EIA, State Energy Data System, Total Consumption Per Capita Expenditures. Total Energy per Capita: EIA, State Energy Data System, Total Expenditures Per Capita Production. Total Energy: EIA, State Energy Data System, Total Energy Production Crude Oil: EIA, Petroleum Supply Annual, Crude Oil Production Petroleum in the United States has been a major industry since shortly after the oil discovery in the Oil Creek area of Titusville, Pennsylvania in 1859. The petroleum industry includes exploration for, production, processing (refining), transportation, and marketing of natural gas and petroleum products. As of 2019, the U.S. is the world's largest oil producer. The Bottom Line A handful of states are responsible for much of the domestic oil production in the United States, and these states have a long association with the oil industry, dating back more