Where is Benton County?

9 Benton Counties in 9 states · 772,856 people (2025)

There are 9 counties named Benton County in the United States, in Arkansas, Indiana, Iowa, Minnesota, Mississippi, Missouri, Oregon, Tennessee and Washington. The most populous is Benton County, Arkansas (county seat: Bentonville), with 332,554 people in 2025. 7 of them are named after Thomas Hart Benton, State Senator from Tennessee, Senator and U.S. Representative from Missouri (1782–1858).

Map of the United States showing where all 9 Benton Counties are, labeled by state
Every Benton 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 9 Benton Counties

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

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Benton County, ArkansasBentonville332,5548481836Thomas Hart Benton
Benton County, IndianaFowler8,8834061840Thomas Hart Benton
Benton County, IowaVinton26,0047161837Thomas Hart Benton
Benton County, MinnesotaFoley41,7444081849Thomas Hart Benton
Benton County, MississippiAshland7,5024071870Samuel Benton
Benton County, MissouriWarsaw20,5367041835Thomas Hart Benton
Benton County, OregonCorvallis97,7286751847Thomas Hart Benton
Benton County, TennesseeCamden16,1833941836David Benton
Benton County, WashingtonProsser221,7221,7001905Thomas Hart Benton

Questions about Benton Counties

How many Benton Counties are there?

There are 9 Benton Counties in the United States, in Arkansas, Indiana, Iowa, Minnesota, Mississippi, Missouri, Oregon, Tennessee and Washington.

Which Benton County is the largest?

By population, Benton County, Arkansas (332,554 people in 2025). By land area, Benton County, Washington (1,700 sq mi).

Which Benton County is the oldest?

Benton County, Missouri, established in 1835. The newest is Benton County, Washington (1905).

Why are there so many Benton Counties?

7 of the 9 are named after Thomas Hart Benton, State Senator from Tennessee, Senator and U.S. Representative from Missouri (1782–1858). Many counties took their names from the same founders, presidents and generals as new states were organized.

How do I find out which Benton 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