Resident Population in Lamar County, AL was 13.66100 Thous. of Persons in January of 2023, according to the United States Federal Reserve. Historically, Resident Population in Lamar County, AL reached a record high of 16.52900 in January of 1985 and a record low of 13.66100 in January of 2023. Trading Economics provides the current actual value, an historical data chart and related indicators for Resident Population in Lamar County, AL - last updated from the United States Federal Reserve on June of 2024.