Resident Population in Santa Clara County, CA was 1926.32500 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Santa Clara County, CA reached a record high of 1932.25100 in January of 2017 and a record low of 1065.31300 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Santa Clara County, CA - last updated from the United States Federal Reserve on April of 2026.