Allen County Decennial Population Statistics - 1820 - 1990: Includes total population, county area, and population density.
Allen County Kentucky: Provides government information, forms, licenses, and contact details.
Capitol Impact: Allen County: Political, educational, and economic data.
National Association of Counties - Allen County Data: Contains a list of elected officials, cities within the county, census details, and contact details for the county court house.
U.S. Census Bureau - Allen County Quick Facts: Provides population and economic information.