The Orcutt Oil Field is a large oil field in the Solomon Hills south of Orcutt, in Santa Barbara County, California, United States. Discovered in 1901 by William Warren Orcutt, it was the first giant field to be found in Santa Barbara County, and its development led to the boom town of Orcutt, now the major unincorporated southern suburb of Santa Maria. With a cumulative production in 2008 of 870,000 barrels (138,000 m3) of oil, it is the largest onshore producing field in Santa Barbara County.

The Lompoc Oil Field is a large oil field in the Purisima Hills north of Lompoc, California, in Santa Barbara County. Discovered in 1903, two years after the discovery of the Orcutt Oil Field in the Solomon Hills, it is one of the oldest oil fields in northern Santa Barbara County, and one of the closest to exhaustion, reporting only 1.7 million barrels (270,000 m3) of recoverable oil remaining out of its original 50 million barrels (7,900,000 m3) as of the end of 2008. Its sole operator is Sentinel Peak Resources, who acquired it from Freeport-McMoRan. In 2009, the proposed decommissioning and habitat restoration of the 3,700-acre (15 km2) field was part of a controversial and so-far unsuccessful deal between Plains, several environmental groups, Santa Barbara County, and the State of California, to allow Plains to carry out new offshore oil drilling on the Tranquillon Ridge, in the Pacific Ocean about twenty miles (32 km) southwest of the Lompoc field.