Resident Population in Santa Barbara County, CA was 444.50000 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Santa Barbara County, CA reached a record high of 448.08300 in January of 2020 and a record low of 264.32400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Santa Barbara County, CA - last updated from the United States Federal Reserve on April of 2026.