Resident Population in Caribou County, ID was 7.21900 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Caribou County, ID reached a record high of 8.87300 in January of 1982 and a record low of 6.20000 in January of 1972. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Caribou County, ID - last updated from the United States Federal Reserve on May of 2024.