Resident Population in Clarke County, IA was 9.58800 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Clarke County, IA reached a record high of 9.75600 in January of 2021 and a record low of 7.58100 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Clarke County, IA - last updated from the United States Federal Reserve on May of 2024.