Resident Population in Harris County, GA was 36.92900 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Harris County, GA reached a record high of 36.92900 in January of 2024 and a record low of 11.52000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Harris County, GA - last updated from the United States Federal Reserve on April of 2026.