Resident Population in McDuffie County, GA was 21.76400 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in McDuffie County, GA reached a record high of 21.89900 in January of 2009 and a record low of 15.20000 in January of 1971. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in McDuffie County, GA - last updated from the United States Federal Reserve on April of 2026.