Where is Beaver County?

3 Beaver Counties in 3 states · 178,215 people (2025)

There are 3 counties named Beaver County in the United States, in Oklahoma, Pennsylvania and Utah. The most populous is Beaver County, Pennsylvania (county seat: Beaver), with 166,032 people in 2025. 2 of them are named after Beaver River, river in Oklahoma and Texas, United States.

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

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

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Beaver County, OklahomaBeaver4,8821,8151890Beaver River
Beaver County, PennsylvaniaBeaver166,0324351800Beaver River
Beaver County, UtahBeaver7,3012,5831856Canadian beaver

Questions about Beaver Counties

How many Beaver Counties are there?

There are 3 Beaver Counties in the United States, in Oklahoma, Pennsylvania and Utah.

Which Beaver County is the largest?

By population, Beaver County, Pennsylvania (166,032 people in 2025). By land area, Beaver County, Utah (2,583 sq mi).

Which Beaver County is the oldest?

Beaver County, Pennsylvania, established in 1800. The newest is Beaver County, Oklahoma (1890).

Why are there so many Beaver Counties?

2 of the 3 are named after Beaver River, river in Oklahoma and Texas, 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 Beaver 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