De Kalb County, AL - Resident Population in DeKalb County, AL was 72.56900 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, De Kalb County, AL - Resident Population in DeKalb County, AL reached a record high of 72.56900 in January of 2023 and a record low of 41.98100 in January of 1970. Trading Economics provides the current actual value, an historical data chart and related indicators for De Kalb County, AL - Resident Population in DeKalb County, AL - last updated from the United States Federal Reserve on May of 2024.