Ellisville is a town in and the first county seat of Jones County, Mississippi, United States. The population was 4,448 at the time of the 2010 cens…Ellisville is a town in and the first county seat of Jones County, Mississippi, United States. The population was 4,448 at the time of the 2010 census, up from 3,465 at the 2000 census. The Jones County Courthouse is located here, as is much of the county government.