Where is Dickinson County?

3 Dickinson Counties in 3 states · 62,541 people (2025)

There are 3 counties named Dickinson County in the United States, in Iowa, Kansas and Michigan. The most populous is Dickinson County, Michigan (county seat: Iron Mountain), with 25,827 people in 2025. 2 of them are named after Daniel S. Dickinson, American politician, lawyer and postmaster (1800-1866).

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

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

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Dickinson County, IowaSpirit Lake18,0773811851Daniel S. Dickinson
Dickinson County, KansasAbilene18,6378471857Daniel S. Dickinson
Dickinson County, MichiganIron Mountain25,8277611891Donald M. Dickinson

Questions about Dickinson Counties

How many Dickinson Counties are there?

There are 3 Dickinson Counties in the United States, in Iowa, Kansas and Michigan.

Which Dickinson County is the largest?

By population, Dickinson County, Michigan (25,827 people in 2025). By land area, Dickinson County, Kansas (847 sq mi).

Which Dickinson County is the oldest?

Dickinson County, Iowa, established in 1851. The newest is Dickinson County, Michigan (1891).

Why are there so many Dickinson Counties?

2 of the 3 are named after Daniel S. Dickinson, American politician, lawyer and postmaster (1800-1866). Many counties took their names from the same founders, presidents and generals as new states were organized.

How do I find out which Dickinson 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.

What county am I in? →

Other common county names