Resident Population in Guthrie County, IA was 10.72200 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Guthrie County, IA reached a record high of 12.70000 in January of 1972 and a record low of 10.58600 in January of 2021. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Guthrie County, IA - last updated from the United States Federal Reserve on May of 2024.