Santa Barbara County, California is located in Southern California. As of the 2020 census, the population was 448,229. 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, winemaking, agriculture & education. The software development and tourism industries are important employers in the southern part of the county.