Jasper is a city in Hamilton County, Florida, United States. The population was 1,780 at the 2000 census. As of 2004, the population estimated by the U.S. Census Bureau is 1,848 http://www. census. gov/popest/cities/tables/SUB-EST2004-04-12. xls. It is the county seat of Hamilton County. The Old Hamilton County Jail and the United Methodist Church in Jasper, Florida are on the National Register of Historic Places. One of the largest industries is phosphate mining.