Resident Population in Imperial County, CA was 179.05700 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Imperial County, CA reached a record high of 181.25000 in January of 2017 and a record low of 74.49200 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Imperial County, CA - last updated from the United States Federal Reserve on May of 2024.