Resident Population in Washington County, GA was 19.82000 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Washington County, GA reached a record high of 21.19200 in January of 2000 and a record low of 17.48000 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Washington County, GA - last updated from the United States Federal Reserve on May of 2024.