Resident Population in California was 38965.19300 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in California reached a record high of 39503.20000 in January of 2020 and a record low of 1490.00000 in January of 1900. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in California - last updated from the United States Federal Reserve on April of 2024.