Resident Population in Chickasaw County, IA was 11.65800 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Chickasaw County, IA reached a record high of 15.50000 in January of 1978 and a record low of 11.65800 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Chickasaw County, IA - last updated from the United States Federal Reserve on May of 2024.