Where is Blaine County?

4 Blaine Counties in 4 states · 41,350 people (2025)

There are 4 counties named Blaine County in the United States, in Idaho, Montana, Nebraska and Oklahoma. The most populous is Blaine County, Idaho (county seat: Hailey), with 25,517 people in 2025. 4 of them are named after James G. Blaine, American politician (1830–1893).

Map of the United States showing where all 4 Blaine Counties are, labeled by state
Every Blaine 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 4 Blaine Counties

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

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Blaine County, IdahoHailey25,5172,6381895James G. Blaine
Blaine County, MontanaChinook6,8604,2281912James G. Blaine
Blaine County, NebraskaBrewster4587111885James G. Blaine
Blaine County, OklahomaWatonga8,515929–James G. Blaine

Questions about Blaine Counties

How many Blaine Counties are there?

There are 4 Blaine Counties in the United States, in Idaho, Montana, Nebraska and Oklahoma.

Which Blaine County is the largest?

By population, Blaine County, Idaho (25,517 people in 2025). By land area, Blaine County, Montana (4,228 sq mi).

Which Blaine County is the oldest?

Blaine County, Nebraska, established in 1885. The newest is Blaine County, Montana (1912).

Why are there so many Blaine Counties?

4 of the 4 are named after James G. Blaine, American politician (1830–1893). Many counties took their names from the same founders, presidents and generals as new states were organized.

How do I find out which Blaine 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