The historic town of Julesburg is a statutory town that is the county seat of Sedgwick County, Colorado, United States. The town is located on the north side of the South Platte River. The population was 1,467 at the U.S. Census 2000. It is the northernmost town in the state, located less than a mile south of the Nebraska border. According to the Colorado Historical Society, the original trading post was named for Jules Beni.