Home History of Killen News and Announements Departments Community Contact Killen is a town located in Lauderdale County, Alabama. It is part of the Florence-Muscle Shoals Metropolitan Statistical Area known as "The Shoals". It was incorporated in 1957 and has a population of 1,108. Copyright © Kelly Jeffreys. All Rights Reserved Share to Facebook Share to Twitter Share to Print Share to Email More AddThis Share options