De Kalb County, GA - Resident Population in DeKalb County, GA was 762.99200 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, De Kalb County, GA - Resident Population in DeKalb County, GA reached a record high of 764.42000 in January of 2020 and a record low of 415.38700 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for De Kalb County, GA - Resident Population in DeKalb County, GA - last updated from the United States Federal Reserve on May of 2024.