Killen is a town located in Lauderdale County, in the state of Alabama (AL), United States. Nestled in the East South Central division of the South region, it covers an area of 1.9 square miles (5.0 km²) and sits at an elevation of 610 ft. With a population of approximately 1,119 residents, Killen offers a peaceful, rural atmosphere.
The town's population is composed of about 47.9% males and 52.1% females, and it has a population density of 588.95 people per square mile (227.39/km²). Killen lies at a latitude of 34.86 and a longitude of -87.53, operating in the UTC-6.
Locals reflect a blend of American ancestry, with roots primarily in United States (28.6%), followed by English (9.5%), German (7.4%), and Scotch-Irish (0%) heritage. The town is identified by the ZIP code 35645.