Where is Teton County?

3 Teton Counties in 3 states · 43,083 people (2025)

There are 3 counties named Teton County in the United States, in Idaho, Montana and Wyoming. The most populous is Teton County, Wyoming (county seat: Jackson), with 23,333 people in 2025. 3 of them are named after Teton Range, mountain range of the Rocky Mountains in Teton County, Idaho and Teton County, Wyoming in the United States.

Map of the United States showing where all 3 Teton Counties are, labeled by state
Every Teton 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 Teton Counties

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

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Teton County, IdahoDriggs13,2544491915Teton Range
Teton County, MontanaChoteau6,4962,2721893Teton Range
Teton County, WyomingJackson23,3333,9971921Teton Range

Questions about Teton Counties

How many Teton Counties are there?

There are 3 Teton Counties in the United States, in Idaho, Montana and Wyoming.

Which Teton County is the largest?

By population, Teton County, Wyoming (23,333 people in 2025). By land area, Teton County, Wyoming (3,997 sq mi).

Which Teton County is the oldest?

Teton County, Montana, established in 1893. The newest is Teton County, Wyoming (1921).

Why are there so many Teton Counties?

3 of the 3 are named after Teton Range, mountain range of the Rocky Mountains in Teton County, Idaho and Teton County, Wyoming in the United States. Many counties took their names from the same founders, presidents and generals as new states were organized.

How do I find out which Teton 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