Resident Population in Barry County, MO was 35.61800 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Barry County, MO reached a record high of 36.18400 in January of 2008 and a record low of 19.59700 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Barry County, MO - last updated from the United States Federal Reserve on April of 2026.