Resident Population in Fremont County, IA was 6.45800 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Fremont County, IA reached a record high of 9.80000 in January of 1972 and a record low of 6.45800 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Fremont County, IA - last updated from the United States Federal Reserve on May of 2024.