CountyAtlas

Iowa County Map with Cities — All 99 Counties

All 99 of Iowa's counties, mapped from official U.S. Census boundaries with population, income, and unemployment for every one. Color the map by any measure, tap a county for its data, or download a print-ready copy.

Iowa CountiesFIPS 19
Adair CountyAdams CountyAllamakee CountyAppanoose CountyAudubon CountyBenton CountyBlack Hawk CountyBoone CountyBremer CountyBuchanan CountyBuena Vista CountyButler CountyCalhoun CountyCarroll CountyCass CountyCedar CountyCerro Gordo CountyCherokee CountyChickasaw CountyClarke CountyClay CountyClayton CountyClinton CountyCrawford CountyDallas CountyDavis CountyDecatur CountyDelaware CountyDes Moines CountyDickinson CountyDubuque CountyEmmet CountyFayette CountyFloyd CountyFranklin CountyFremont CountyGreene CountyGrundy CountyGuthrie CountyHamilton CountyHancock CountyHardin CountyHarrison CountyHenry CountyHoward CountyHumboldt CountyIda CountyIowa CountyJackson CountyJasper CountyJefferson CountyJohnson CountyJones CountyKeokuk CountyKossuth CountyLee CountyLinn CountyLouisa CountyLucas CountyLyon CountyMadison CountyMahaska CountyMarion CountyMarshall CountyMills CountyMitchell CountyMonona CountyMonroe CountyMontgomery CountyMuscatine CountyO'Brien CountyOsceola CountyPage CountyPalo Alto CountyPlymouth CountyPocahontas CountyPolk CountyPottawattamie CountyPoweshiek CountyRinggold CountySac CountyScott CountyShelby CountySioux CountyStory CountyTama CountyTaylor CountyUnion CountyVan Buren CountyWapello CountyWarren CountyWashington CountyWayne CountyWebster CountyWinnebago CountyWinneshiek CountyWoodbury CountyWorth CountyWright CountyDes MoinesCedar RapidsDavenportSioux CityIowa CityAnkenyWaterlooCouncil BluffsDubuqueWaukeeMarshalltownMason City Kossuth  Sioux  Harrison  Monona  Lyon  Wright  Clay  Ringgold  Lee  Fremont  Appanoose  Wapello  Des Moines  Cedar Rapids  Davenport  Sioux City  Iowa City  Ankeny  Waterloo  Council Bluffs  Dubuque  Waukee  Marshalltown  Mason City Des MoinesCedar RapidsDavenportSioux CityIowa CityAnkenyWest Des MoinesWaterlooCouncil BluffsDubuqueMarshalltownMason City Kossuth  Plymouth  Sioux  Jasper  Fayette  Webster  Crawford  Jackson  Lyon  Wright  Butler  Pocahontas  Hardin  Washington  Clay  Ringgold  Lee  Page  Wayne  Davis  Howard  Mills  Jefferson  Monroe  Clarke  Adams  Worth  Dickinson  Des Moines  Cedar Rapids  Davenport  Sioux City  Iowa City  Ankeny  West Des Moines  Waterloo  Council Bluffs  Dubuque  Marshalltown  Mason City Des MoinesCedar RapidsDavenportSioux CityIowa CityAnkenyWest Des MoinesAmesWaterlooCouncil BluffsDubuqueMarionMarshalltownMason City Kossuth  Plymouth  Clayton  Sioux  Webster  Crawford  Clinton  Harrison  Winneshiek  Jackson  Lyon  Wright  Buena Vista  Keokuk  Butler  Sac  Hardin  Marion  O'Brien  Greene  Clay  Adair  Ringgold  Lee  Page  Wayne  Davis  Mitchell  Muscatine  Mills  Jefferson  Monroe  Clarke  Des Moines  Adams  Louisa  Winnebago  Dickinson  Des Moines  Cedar Rapids  Davenport  Sioux City  Iowa City  Ankeny  West Des Moines  Ames  Waterloo  Council Bluffs  Dubuque  Marion  Marshalltown  Mason City Des MoinesCedar RapidsDavenportSioux CityIowa CityAnkenyWest Des MoinesAmesWaterlooCouncil BluffsDubuqueUrbandaleMarionCedar FallsWaukeeMarshalltownMason City Kossuth  Plymouth  Clayton  Sioux  Fayette  Benton  Webster  Crawford  Clinton  Harrison  Monona  Winneshiek  Jackson  Shelby  Lyon  Cedar  Wright  Buena Vista  Franklin  Keokuk  Butler  Sac  Delaware  Hardin  Marion  O'Brien  Boone  Hancock  Greene  Clay  Adair  Palo Alto  Warren  Carroll  Ringgold  Lee  Page  Wayne  Fremont  Davis  Mitchell  Bremer  Mills  Jefferson  Monroe  Lucas  Ida  Clarke  Des Moines  Union  Adams  Louisa  Worth  Dickinson  Emmet  Des Moines  Cedar Rapids  Davenport  Sioux City  Iowa City  Ankeny  West Des Moines  Ames  Waterloo  Council Bluffs  Dubuque  Urbandale  Marion  Cedar Falls  Waukee  Marshalltown  Mason City 
Albers Equal Area ConicDatum WGS 84Census PEP V2025 · Census SAIPE 2024 · BLS LAUS September 2026, preliminary · Census TIGER 2026
CountyAtlasEdition
Iowa’s 99 counties, projected equal-area. Hover over a county, or tap it, for its seat and key numbers; select it for all its data.
Color counties by

Tap any county for its population, income, and more.

Iowa at a glance

Iowa’s 99 counties, by the numbers

The table lists every county’s population, median household income, unemployment, density, and land area. Sort it by any column to find yours or rank them. A few patterns stand out:

  • Concentrated. Half of Iowa’s 3,238,387 residents live in just 9 of 99 counties, and the 5 largest hold 37.5% of the total. calculated from Census PEP V2025
  • Income tracks poverty. The gap from richest to poorest runs 1.8×, and the 10 highest-income counties average 7.4% in poverty against 14.2% for the 10 lowest. calculated from Census SAIPE 2024
  • The median county. Half of Iowa’s counties have fewer than 14,901 residents, and half report a median household income below $72,456. calculated from Census PEP V2025 · Census SAIPE 2024
  • Lopsided density. Only 20 of 99 counties are denser than Iowa’s statewide average of 58 people per square mile. calculated from Census PEP V2025 · Census TIGER 2026
Adair County7,403$73,6421.9%13/sq mi569 sq miGreenfield
Adams County3,617$64,2132.2%9/sq mi423 sq miCorning
Allamakee County14,238$71,7283.2%22/sq mi639 sq miWaukon
Appanoose County12,077$57,4593.9%24/sq mi497 sq miCenterville
Audubon County5,509$68,7322.2%12/sq mi443 sq miAudubon
Benton County26,004$85,8482.9%36/sq mi716 sq miVinton
Black Hawk County131,532$70,5533.6%232/sq mi566 sq miWaterloo
Boone County26,799$80,9862.4%47/sq mi570 sq miBoone
Bremer County25,296$83,5653.0%58/sq mi435 sq miWaverly
Buchanan County20,883$81,1912.9%37/sq mi571 sq miIndependence
Buena Vista County20,449$77,0832.6%36/sq mi575 sq miStorm Lake
Butler County14,049$77,3223.1%24/sq mi580 sq miAllison
Calhoun County9,562$62,3852.6%17/sq mi570 sq miRockwell City
Carroll County20,303$81,3382.4%36/sq mi569 sq miCarroll
Cass County12,960$63,6712.7%23/sq mi564 sq miAtlantic
Cedar County18,359$84,9702.7%32/sq mi579 sq miTipton
Cerro Gordo County42,372$73,9373.0%75/sq mi568 sq miMason City
Cherokee County11,369$82,7152.2%20/sq mi577 sq miCherokee
Chickasaw County11,663$82,8402.5%23/sq mi504 sq miNew Hampton
Clarke County9,574$68,6422.5%22/sq mi431 sq miOsceola
Clay County16,202$61,5302.7%29/sq mi567 sq miSpencer
Clayton County16,845$77,9832.8%22/sq mi778 sq miElkader
Clinton County46,002$70,5464.6%66/sq mi695 sq miClinton
Crawford County16,237$70,7733.7%23/sq mi714 sq miDenison
Dallas County118,457$99,6833.0%201/sq mi588 sq miAdel
Davis County9,230$70,6763.5%18/sq mi502 sq miBloomfield
Decatur County7,655$56,1863.3%14/sq mi532 sq miLeon
Delaware County17,674$79,4072.5%31/sq mi578 sq miManchester
Des Moines County38,077$65,7964.2%92/sq mi416 sq miBurlington
Dickinson County18,077$86,0222.8%48/sq mi381 sq miSpirit Lake
Dubuque County99,381$80,3553.1%163/sq mi608 sq miDubuque
Emmet County9,107$64,3933.2%23/sq mi396 sq miEstherville
Fayette County19,047$63,6253.1%26/sq mi731 sq miWest Union
Floyd County14,901$71,8483.2%30/sq mi501 sq miCharles City
Franklin County9,868$71,7113.2%17/sq mi582 sq miHampton
Fremont County6,522$70,4782.7%13/sq mi511 sq miSidney
Greene County8,658$69,4693.3%15/sq mi570 sq miJefferson
Grundy County12,361$84,2032.8%25/sq mi502 sq miGrundy Center
Guthrie County10,782$75,0472.7%18/sq mi591 sq miGuthrie Center
Hamilton County14,944$76,0542.5%26/sq mi577 sq miWebster City
Hancock County10,528$67,6672.6%18/sq mi571 sq miGarner
Hardin County16,455$72,3812.8%29/sq mi569 sq miEldora
Harrison County14,623$84,4022.7%21/sq mi697 sq miLogan
Henry County19,349$69,3133.5%45/sq mi434 sq miMount Pleasant
Howard County9,415$71,1632.6%20/sq mi473 sq miCresco
Humboldt County9,409$75,4342.6%22/sq mi434 sq miDakota City
Ida County6,777$72,4562.5%16/sq mi432 sq miIda Grove
Iowa County16,504$78,4652.9%28/sq mi586 sq miMarengo
Jackson County19,288$71,1353.7%30/sq mi636 sq miMaquoketa
Jasper County38,153$74,7903.2%52/sq mi730 sq miNewton
Jefferson County15,291$63,7883.3%35/sq mi436 sq miFairfield
Johnson County160,044$77,1242.8%261/sq mi613 sq miIowa City
Jones County21,253$76,0933.2%37/sq mi576 sq miAnamosa
Keokuk County9,797$56,3162.8%17/sq mi579 sq miSigourney
Kossuth County14,322$73,8602.9%15/sq mi973 sq miAlgona
Lee County32,306$63,4793.5%62/sq mi518 sq miFort Madison; Keokuk
Linn County232,028$75,6393.5%324/sq mi717 sq miCedar Rapids
Louisa County10,416$72,7533.0%26/sq mi402 sq miWapello
Lucas County8,847$61,4573.5%21/sq mi431 sq miChariton
Lyon County12,354$85,1852.1%21/sq mi588 sq miRock Rapids
Madison County17,270$90,5392.8%31/sq mi561 sq miWinterset
Mahaska County21,880$72,1992.5%38/sq mi571 sq miOskaloosa
Marion County34,192$81,6722.6%62/sq mi554 sq miKnoxville
Marshall County39,890$68,6604.7%70/sq mi573 sq miMarshalltown
Mills County14,793$88,8092.8%34/sq mi437 sq miGlenwood
Mitchell County10,650$84,3442.6%23/sq mi469 sq miOsage
Monona County8,539$68,1682.7%12/sq mi694 sq miOnawa
Monroe County7,406$69,3663.0%17/sq mi434 sq miAlbia
Montgomery County10,002$63,1172.7%24/sq mi424 sq miRed Oak
Muscatine County41,853$71,3303.6%96/sq mi437 sq miMuscatine
O'Brien County14,220$69,9672.2%25/sq mi573 sq miPrimghar
Osceola County5,980$73,3971.9%15/sq mi399 sq miSibley
Page County14,856$64,1932.5%28/sq mi535 sq miClarinda
Palo Alto County8,899$67,3772.4%16/sq mi564 sq miEmmetsburg
Plymouth County25,697$88,9032.7%30/sq mi863 sq miLe Mars
Pocahontas County6,819$67,2682.7%12/sq mi577 sq miPocahontas
Polk County516,546$82,9603.4%902/sq mi573 sq miDes Moines
Pottawattamie County92,996$73,7993.4%98/sq mi951 sq miCouncil Bluffs
Poweshiek County18,368$72,9292.6%31/sq mi585 sq miMontezuma
Ringgold County4,642$62,6082.3%9/sq mi535 sq miMount Ayr
Sac County9,525$73,2942.4%17/sq mi575 sq miSac City
Scott County175,259$78,9914.6%383/sq mi458 sq miDavenport
Shelby County11,689$78,1082.4%20/sq mi591 sq miHarlan
Sioux County36,774$81,7462.1%48/sq mi768 sq miOrange City
Story County101,291$69,8683.1%177/sq mi573 sq miNevada
Tama County16,796$73,4933.9%23/sq mi721 sq miToledo
Taylor County5,835$63,3732.2%11/sq mi532 sq miBedford
Union County11,829$63,9973.0%28/sq mi424 sq miCreston
Van Buren County7,131$60,8812.9%15/sq mi485 sq miKeosauqua
Wapello County35,210$67,3704.1%82/sq mi432 sq miOttumwa
Warren County57,331$101,6403.0%101/sq mi570 sq miIndianola
Washington County22,667$77,9162.4%40/sq mi569 sq miWashington
Wayne County6,738$62,2022.6%13/sq mi525 sq miCorydon
Webster County36,838$66,2983.3%51/sq mi716 sq miFort Dodge
Winnebago County10,251$71,4433.1%26/sq mi400 sq miForest City
Winneshiek County19,733$79,9962.4%29/sq mi690 sq miDecorah
Woodbury County106,649$76,9743.2%122/sq mi873 sq miSioux City
Worth County7,338$74,0472.4%18/sq mi400 sq miNorthwood
Wright County12,801$69,2412.5%22/sq mi580 sq miClarion

Click a column heading to sort all 99 counties. A suppressed estimate (coefficient of variation ≥ 0.30) shows a marker, never a guess. County seats are from Wikidata (CC0), each validated to a Census place inside its county. Where Wikidata has none, the seat comes from the page cited for that county in the seat file, and where the table names no seat, it says why. See the methodology.

Download & print this Iowa map

Map of Iowa's 99 counties on official U.S. Census boundaries, with major cities: Des Moines, Cedar Rapids, Davenport, Sioux City, Iowa City, Ankeny

Free, print-ready maps of all 99 Iowa counties on official U.S. Census boundaries, with no watermark. They are public domain (CC0).

  • Full map (counties and major cities): PNG · PDF
  • Blank outline to print and label yourself: PNG · PDF
  • Counties only, labeled, for reference: PNG · PDF

Iowa maps, colored by the data

Map of Iowa counties shaded by population, from official U.S. Census data
Population Map by County · Census PEP V2025
Map of Iowa counties shaded by median household income, from official U.S. Census data
Median Household Income Map by County · Census SAIPE 2024
Map of Iowa counties shaded by unemployment rate, from U.S. Bureau of Labor Statistics data
Unemployment Rate Map by County · BLS LAUS September 2026, preliminary

Cities in Iowa

Iowa has 939 incorporated cities. The largest is Des Moines with 212,421 residents. Its center is in Polk County, and it also reaches into Warren County. Use the search on the map above to find any city and highlight the county it sits in.

Des MoinesPolk County +1 more (also Warren County)212,421
Cedar RapidsLinn County137,264
DavenportScott County100,913
Sioux CityWoodbury County +1 more (also Plymouth County)86,101
Iowa CityJohnson County75,752
AnkenyPolk County72,615
West Des MoinesPolk County +3 more (also Dallas County, Warren County, Madison County)71,083
AmesStory County67,669
WaterlooBlack Hawk County67,008
Council BluffsPottawattamie County62,586
DubuqueDubuque County59,174
UrbandalePolk County +1 more (also Dallas County)46,595
MarionLinn County41,896
Cedar FallsBlack Hawk County40,888
BettendorfScott County39,647
WaukeeDallas County29,236
MarshalltownMarshall County27,626
Mason CityCerro Gordo County27,050
OttumwaWapello County25,430
Fort DodgeWebster County24,827
JohnstonPolk County24,384
ClintonClinton County24,322
BurlingtonDes Moines County23,728
MuscatineMuscatine County23,489
CoralvilleJohnson County23,234
AltoonaPolk County21,495
North LibertyJohnson County21,125
ClivePolk County +1 more (also Dallas County)19,012
GrimesPolk County +1 more (also Dallas County)16,366
IndianolaWarren County16,044
NewtonJasper County15,700
NorwalkWarren County +1 more (also Polk County)14,183
BooneBoone County12,424
OskaloosaMahaska County11,504
Storm LakeBuena Vista County11,428
SpencerClay County11,400
Pleasant HillPolk County11,136
PellaMarion County +1 more (also Mahaska County)10,720
Le MarsPlymouth County10,640
WaverlyBremer County10,494
CarrollCarroll County10,208
Fort MadisonLee County10,133
KeokukLee County9,662
GrinnellPoweshiek County9,505
FairfieldJefferson County9,456
Mount PleasantHenry County8,951
BondurantPolk County8,560
Sioux CenterSioux County8,454
DenisonCrawford County8,260
PerryDallas County7,985

The table shows the 50 most populous. Search the map above for the other 889.

A city can reach into more than one county. The table names the one its center falls in; “+N more” counts the others, from the Census Bureau’s count of each city by county part Census ACS 2020–2024 place parts.

Which Iowa county is the richest, largest, most crowded? The answers

  • Iowa’s highest median household income is in Warren County ($101,640); the lowest is in Decatur County ($56,186). Census SAIPE 2024
  • Iowa’s most populous county is Polk County (516,546); the least populous is Adams County (3,617), a 143× spread. calculated from Census PEP V2025
  • Iowa’s largest county by land area is Kossuth County (973 sq mi); the smallest is Dickinson County (381 sq mi). Census TIGER 2026
  • Iowa’s highest population density is in Polk County (902/sq mi); the lowest is in Adams County (9/sq mi). calculated from Census PEP V2025 · Census TIGER 2026
  • Iowa’s highest poverty rate is in Decatur County (18.1%); the lowest is in Dallas County (5.2%). Census SAIPE 2024
  • In Iowa, unemployment is highest in Marshall County (4.7%) and lowest in Adair County and Osceola County (tied at 1.9%), for September 2026 (preliminary). BLS LAUS September 2026, preliminary
  • Iowa’s highest median age is in Dickinson County (48.7); the lowest is in Story County (26.9). Census ACS 2020–2024
  • Iowa’s highest share of adults 25 and over with a bachelor’s degree or higher is in Johnson County (55.2%); the lowest is in Clayton County (14.5%). Census ACS 2020–2024

Every figure is a current official estimate from the source named, never a crowd-sourced or copied value. Suppressed estimates (coefficient of variation ≥ 0.30) are omitted, never guessed. See the full methodology.

Iowa counties: common questions

How many counties are in Iowa?

Iowa has 99 counties covering 55,854 sq mi and about 3.2M residents. Every one is on the map and in the table above.

What is the largest county in Iowa?

It depends on the measure. By land area it’s Kossuth County (973 sq mi); by population it’s Polk County (516,546 residents).

What county is Des Moines in?

Des Moines, population 212,421, has its center in Polk County and also reaches into Warren County. Use the search on the map to find any Iowa city’s county.

What is the richest county in Iowa?

By median household income, Warren County is the richest at $101,640; the poorest is Decatur County at $56,186. Census SAIPE 2024

What is the most populous county in Iowa?

Polk County, with 516,546 residents, about 16.0% of Iowa’s people. That is 143× the least populous, Adams County (3,617).

Sources & vintages

Data current through .

By , BSc Physics, University of Ljubljana · How this site is made