Santa Barbara County, California, officially the County of Santa Barbara, is a county located in the southern portion of the state of California, in the United States. As of the 2010 census, the population was 423,895. The county seat is Santa Barbara, and the largest city is Santa Maria.
Santa Barbara County comprises the Santa Maria-Santa Barbara, CA Metropolitan Statistical Area. Most of the county is part of the California Central Coast. Mainstays of the county’s economy include engineering, resource extraction (particularly petroleum extraction and diatomaceous earth mining), winemaking, agriculture, and education. The software development and tourism industries are important employers in the southern part of the county. Southern Santa Barbara County is sometimes considered the northern cultural boundary of Southern California.