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. Julesburg was featured in the 1960 episode "The Story of Julesburg" of the syndicated television series Pony Express (1959–1960). James Best and Sebastian Cabot guest starred in the segment. Julesburg was on the Pony Express (1860–1861) route from Missouri to California.
The second episode (1955) of the ABC western Cheyenne, starring Clint Walker, is entitled "Julesburg". In the story line, Julesburg is depicted as under the control of a ruthless cattle baron played by Ray Teal, later cast as the sheriff in the NBC series Bonanza.