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Iowa county map

See all 99 counties on one clear, labelled map. Use the alphabetical table below to verify names and compare land area.

Boundary vintage: 2025Source: U.S. Census BureauUpdated September 15, 2026
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Labelled map of Iowa counties AdairAdamsAllamakeeAppanooseAudubonBentonBlack HawkBooneBremerBuchananBuena VistaButlerCalhounCarrollCassCedarCerro GordoCherokeeChickasawClarkeClayClaytonClintonCrawfordDallasDavisDecaturDelawareDes MoinesDickinsonDubuqueEmmetFayetteFloydFranklinFremontGreeneGrundyGuthrieHamiltonHancockHardinHarrisonHenryHowardHumboldtIdaIowaJacksonJasperJeffersonJohnsonJonesKeokukKossuthLeeLinnLouisaLucasLyonMadisonMahaskaMarionMarshallMillsMitchellMononaMonroeMontgomeryMuscatineO'BrienOsceolaPagePalo AltoPlymouthPocahontasPolkPottawattamiePoweshiekRinggoldSacScottShelbySiouxStoryTamaTaylorUnionVan BurenWapelloWarrenWashingtonWayneWebsterWinnebagoWinneshiekWoodburyWorthWright
Boundary data: U.S. Census Bureau 2025 cartographic boundary files. Zoom in for county names, then drag the map or use the arrow keys to move around.
Map scope: This is a county boundary reference map. It does not show roads, parcels, ZIP codes, election precincts, or terrain.

Alphabetical list of Iowa counties

The land-area figures are rounded to the nearest square mile. Water area is shown separately so large lakes or coastal waters do not obscure the comparison.

NameFIPS codeLand areaWater area
Adair County19001569 sq mi1 sq mi
Adams County19003423 sq mi2 sq mi
Allamakee County19005639 sq mi20 sq mi
Appanoose County19007497 sq mi19 sq mi
Audubon County19009443 sq mi0 sq mi
Benton County19011716 sq mi2 sq mi
Black Hawk County19013566 sq mi7 sq mi
Boone County19015570 sq mi3 sq mi
Bremer County19017435 sq mi4 sq mi
Buchanan County19019571 sq mi2 sq mi
Buena Vista County19021575 sq mi5 sq mi
Butler County19023580 sq mi2 sq mi
Calhoun County19025570 sq mi2 sq mi
Carroll County19027569 sq mi1 sq mi
Cass County19029564 sq mi1 sq mi
Cedar County19031579 sq mi2 sq mi
Cerro Gordo County19033568 sq mi7 sq mi
Cherokee County19035577 sq mi0 sq mi
Chickasaw County19037504 sq mi1 sq mi
Clarke County19039431 sq mi1 sq mi
Clay County19041567 sq mi5 sq mi
Clayton County19043778 sq mi14 sq mi
Clinton County19045695 sq mi15 sq mi
Crawford County19047714 sq mi1 sq mi
Dallas County19049588 sq mi3 sq mi
Davis County19051502 sq mi3 sq mi
Decatur County19053532 sq mi2 sq mi
Delaware County19055578 sq mi1 sq mi
Des Moines County19057416 sq mi14 sq mi
Dickinson County19059381 sq mi23 sq mi
Dubuque County19061608 sq mi8 sq mi
Emmet County19063396 sq mi7 sq mi
Fayette County19065731 sq mi1 sq mi
Floyd County19067501 sq mi1 sq mi
Franklin County19069582 sq mi1 sq mi
Fremont County19071511 sq mi5 sq mi
Greene County19073570 sq mi2 sq mi
Grundy County19075502 sq mi0 sq mi
Guthrie County19077591 sq mi2 sq mi
Hamilton County19079577 sq mi1 sq mi
Hancock County19081571 sq mi2 sq mi
Hardin County19083569 sq mi1 sq mi
Harrison County19085697 sq mi5 sq mi
Henry County19087434 sq mi2 sq mi
Howard County19089473 sq mi0 sq mi
Humboldt County19091434 sq mi1 sq mi
Ida County19093432 sq mi1 sq mi
Iowa County19095586 sq mi1 sq mi
Jackson County19097636 sq mi14 sq mi
Jasper County19099730 sq mi3 sq mi
Jefferson County19101436 sq mi1 sq mi
Johnson County19103613 sq mi10 sq mi
Jones County19105576 sq mi1 sq mi
Keokuk County19107579 sq mi1 sq mi
Kossuth County19109973 sq mi2 sq mi
Lee County19111518 sq mi21 sq mi
Linn County19113717 sq mi8 sq mi
Louisa County19115402 sq mi16 sq mi
Lucas County19117431 sq mi4 sq mi
Lyon County19119588 sq mi0 sq mi
Madison County19121561 sq mi1 sq mi
Mahaska County19123571 sq mi3 sq mi
Marion County19125554 sq mi16 sq mi
Marshall County19127573 sq mi1 sq mi
Mills County19129437 sq mi3 sq mi
Mitchell County19131469 sq mi0 sq mi
Monona County19133694 sq mi5 sq mi
Monroe County19135434 sq mi1 sq mi
Montgomery County19137424 sq mi1 sq mi
Muscatine County19139437 sq mi12 sq mi
O'Brien County19141573 sq mi0 sq mi
Osceola County19143399 sq mi1 sq mi
Page County19145535 sq mi1 sq mi
Palo Alto County19147564 sq mi6 sq mi
Plymouth County19149863 sq mi1 sq mi
Pocahontas County19151577 sq mi1 sq mi
Polk County19153573 sq mi19 sq mi
Pottawattamie County19155951 sq mi8 sq mi
Poweshiek County19157585 sq mi1 sq mi
Ringgold County19159535 sq mi3 sq mi
Sac County19161575 sq mi3 sq mi
Scott County19163458 sq mi10 sq mi
Shelby County19165591 sq mi1 sq mi
Sioux County19167768 sq mi1 sq mi
Story County19169573 sq mi1 sq mi
Tama County19171721 sq mi1 sq mi
Taylor County19173532 sq mi3 sq mi
Union County19175424 sq mi2 sq mi
Van Buren County19177485 sq mi6 sq mi
Wapello County19179432 sq mi4 sq mi
Warren County19181570 sq mi3 sq mi
Washington County19183569 sq mi2 sq mi
Wayne County19185525 sq mi2 sq mi
Webster County19187716 sq mi3 sq mi
Winnebago County19189400 sq mi1 sq mi
Winneshiek County19191690 sq mi0 sq mi
Woodbury County19193873 sq mi5 sq mi
Worth County19195400 sq mi2 sq mi
Wright County19197580 sq mi2 sq mi

Largest Iowa counties by land area

These are the five largest mapped units in Iowa by Census-reported land area:

  1. Kossuth County — 973 square miles
  2. Pottawattamie County — 951 square miles
  3. Woodbury County — 873 square miles
  4. Plymouth County — 863 square miles
  5. Clayton County — 778 square miles

How to read and use this map

County lines are administrative boundaries, not postal routes. A mailing address can use a city name associated with a neighboring area, and ZIP codes can cross county lines. When you need to identify a county for an address, confirm it with an official geocoder or local government source.

For classroom or planning use, print directly from this page. If labels become crowded, choose landscape orientation and reduce page margins. The underlying vector lines remain crisp at different sizes.

Frequently asked questions

How many counties are in Iowa?

Iowa has 99 counties in the U.S. Census Bureau’s 2025 cartographic boundary file.

Can I print this Iowa county map?

Yes. Choose Print map and use landscape orientation for the widest map. Because the map is SVG, its boundary lines stay sharp when scaled.

Are these legal survey boundaries?

No. This is a generalized reference map. Property, parcel, election, and legal boundary questions should be checked with the relevant state or local agency.

Map source

U.S. Census Bureau, 2025 Cartographic Boundary File, Counties, 1:20,000,000. Land and water area fields are supplied in the same file and converted from square meters to square miles. Accessed September 15, 2026.