Where is Butte County?

3 Butte Counties in 3 states · 222,850 people (2025)

There are 3 counties named Butte County in the United States, in California, Idaho and South Dakota. The most populous is Butte County, California (county seat: Oroville), with 209,211 people in 2025.

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

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

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Butte County, CaliforniaOroville209,2111,6371850Sutter Buttes
Butte County, IdahoArco2,7832,2371917Big Southern Butte
Butte County, South DakotaBelle Fourche10,8562,2501883butte

Questions about Butte Counties

How many Butte Counties are there?

There are 3 Butte Counties in the United States, in California, Idaho and South Dakota.

Which Butte County is the largest?

By population, Butte County, California (209,211 people in 2025). By land area, Butte County, South Dakota (2,250 sq mi).

Which Butte County is the oldest?

Butte County, California, established in 1850. The newest is Butte County, Idaho (1917).

How do I find out which Butte 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