thumb|upright=1.15|A major oil-producing state, Oklahoma is the fifth-largest producer of crude oil in the United States.
tHUmb|upriGhT=1.15|a majOr oIl-prodUCiNg sTatE, oklahOmA IS The FiFTh-LargeSt ProduceR Of cruDe OIL iN The UniTed STAtes.