Where is Putnam County?

9 Putnam Counties in 9 states · 426,402 people (2025)

There are 9 counties named Putnam County in the United States, in Florida, Georgia, Illinois, Indiana, Missouri, New York, Ohio, Tennessee and West Virginia. The most populous is Putnam County, New York (county seat: Carmel), with 99,028 people in 2025. 8 of them are named after Israel Putnam, American Revolutionary War general (1718–1790).

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

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

StateCounty seatPopulation 2025Land area (sq mi)EstablishedNamed after
Putnam County, FloridaPalatka77,7347281849Benjamin Alexander Putnam
Putnam County, GeorgiaEatonton23,7223451807Israel Putnam
Putnam County, IllinoisHennepin5,6191601825Israel Putnam
Putnam County, IndianaGreencastle37,8764811822Israel Putnam
Putnam County, MissouriUnionville4,5465171843Israel Putnam
Putnam County, New YorkCarmel99,0282301812Israel Putnam
Putnam County, OhioOttawa34,3804831820Israel Putnam
Putnam County, TennesseeCookeville86,6124011854Israel Putnam
Putnam County, West VirginiaWinfield56,8853461848Israel Putnam

Questions about Putnam Counties

How many Putnam Counties are there?

There are 9 Putnam Counties in the United States, in Florida, Georgia, Illinois, Indiana, Missouri, New York, Ohio, Tennessee and West Virginia.

Which Putnam County is the largest?

By population, Putnam County, New York (99,028 people in 2025). By land area, Putnam County, Florida (728 sq mi).

Which Putnam County is the oldest?

Putnam County, Georgia, established in 1807. The newest is Putnam County, Tennessee (1854).

Why are there so many Putnam Counties?

8 of the 9 are named after Israel Putnam, American Revolutionary War general (1718–1790). Many counties took their names from the same founders, presidents and generals as new states were organized.

How do I find out which Putnam 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