Where is Cheyenne County?

3 Cheyenne Counties in 3 states · 13,845 people (2025)

There are 3 counties named Cheyenne County in the United States, in Colorado, Kansas and Nebraska. The most populous is Cheyenne County, Nebraska (county seat: Sidney), with 9,528 people in 2025. 3 of them are named after Cheyennes, group of indigenous people of the Great Plains.

Map of the United States showing where all 3 Cheyenne Counties are, labeled by state
Every Cheyenne County in the United States (red), labeled with its state. Boundaries: U.S. Census Bureau, 2025. Free to use with attribution (CC BY 4.0).

All 3 Cheyenne Counties

Sorted by state. Each link opens the county's map.

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Cheyenne County, ColoradoCheyenne Wells1,7131,7781889Cheyennes
Cheyenne County, KansasSt. Francis2,6041,0201873Cheyennes
Cheyenne County, NebraskaSidney9,5281,1961867Cheyennes

Questions about Cheyenne Counties

How many Cheyenne Counties are there?

There are 3 Cheyenne Counties in the United States, in Colorado, Kansas and Nebraska.

Which Cheyenne County is the largest?

By population, Cheyenne County, Nebraska (9,528 people in 2025). By land area, Cheyenne County, Colorado (1,778 sq mi).

Which Cheyenne County is the oldest?

Cheyenne County, Nebraska, established in 1867. The newest is Cheyenne County, Colorado (1889).

Why are there so many Cheyenne Counties?

3 of the 3 are named after Cheyennes, group of indigenous people of the Great Plains. Many counties took their names from the same founders, presidents and generals as new states were organized.

How do I find out which Cheyenne County an address is in?

Open the county map of the state: it has a search box for cities, towns and ZIP codes. On a phone, the "what county am I in" tool on our sister site uses your location.

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Other common county names