Resident Population in Kern County, CA was 913.82000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Kern County, CA reached a record high of 916.10800 in January of 2022 and a record low of 330.23400 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Kern County, CA - last updated from the United States Federal Reserve on May of 2024.