Jasper is a city in and the county seat of Walker County, Alabama, United States. Its population was 14,352 as of the 2010 census. Named in honor of Sergeant William Jasper, an American Revolutionary War hero, Jasper was settled around 1815 and incorporated on August 18, 1886. The first significant growth of the area was in 1886 when the Kansas City, Memphis and Birmingham Railroad and the Sheffield& Birmingham Railroads were completed through Jasper.