- Jasper is a city located in the state of Alabama in the United States. It is the county seat of Walker County and has a population of around 13,500 people. The city was named after William Jasper, a Revolutionary War hero. Jasper is known for its mining, particularly coal mining, as well as its proximity to the Bankhead National Forest. The city has a variety of recreational and cultural amenities, including parks, golf courses, and historical sites.