Cheyenne County is a county in the U.S. state of Nebraska. As of the 2020 United States Census, the population was 9,468. Its county seat is Sidney. The county was formed in 1871 and named for the Cheyenne Native American tribe. In the Nebraska license plate system, Cheyenne County is represented by the prefix 39 as it had the 39th-largest number of vehi…
Cheyenne County is a county in the U.S. state of Nebraska. As of the 2020 United States Census, the population was 9,468. Its county seat is Sidney. The county was formed in 1871 and named for the Cheyenne Native American tribe. In the Nebraska license plate system, Cheyenne County is represented by the prefix 39 as it had the 39th-largest number of vehicles registered in the county when the license plate system was established in 1922.