Resident Population in Gentry County, MO was 6.29800 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Gentry County, MO reached a record high of 8.50000 in January of 1972 and a record low of 6.09600 in January of 2009. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Gentry County, MO - last updated from the United States Federal Reserve on April of 2026.