Resident Population in Fremont County, ID was 14.19600 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Fremont County, ID reached a record high of 14.19600 in January of 2023 and a record low of 8.71000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Fremont County, ID - last updated from the United States Federal Reserve on June of 2024.