
Santa Barbara County
- State:
- California
- County Seat:
- Santa Barbara
Santa Barbara County's estimated 2025 population is 435,941 with a growth rate of -0.61% in the past year according to the most recent United States census data. Santa Barbara County is the 20th largest county in California. The 2010 population was 424,218 and has seen a growth of 2.76% since that time.