The South Cuyama Oil Field is a large oil and gas field in the Cuyama Valley and the adjacent northern foothills of the Sierra Madre Mountains in northeastern Santa Barbara County, California. Discovered in 1949, and with a cumulative production of around 225 million barrels (35,800,000 m³) of oil, it ranks 27th in size in the state, but is believed to retain only approximately two percent of its original oil (approximately 4.6 million barrels (730,000 m³)), according to the official estimates of the California Department of Oil, Gas, and Geothermal Resources (DOGGR).