Resident Population in Jefferson Davis County, MS was 11.05900 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Jefferson Davis County, MS reached a record high of 14.42400 in January of 1987 and a record low of 10.99700 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Jefferson Davis County, MS - last updated from the United States Federal Reserve on April of 2026.