Resident Population in Hickory County, MO was 9.04400 Thous. of Persons in January of 2025, according to the United States Federal Reserve. Historically, Resident Population in Hickory County, MO reached a record high of 9.64600 in January of 2010 and a record low of 4.48100 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Hickory County, MO - last updated from the United States Federal Reserve on May of 2026.