Resident Population in Dallas County, AL was 35.54500 Thous. of Persons in January of 2024, according to the United States Federal Reserve. Historically, Resident Population in Dallas County, AL reached a record high of 58.40000 in January of 1975 and a record low of 35.54500 in January of 2024. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Dallas County, AL - last updated from the United States Federal Reserve on April of 2026.