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County · code 19181

Warren CountyIowa

Warren County is in Iowa and has its seat in Indianola. It was created in 1846 and named after Joseph Warren.

  • Founded1846
  • County seatIndianola
  • Named forJoseph Warren
  • Land area570 sq mi + 3.5 sq mi water
  • Population52,403 2020 Census
  • Parcels mapped35,498 checked 15 October 2026
Open the free map Click any parcel in Warren County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

PolkMadisonMarion Indianola Census outline · seat marked

Where it is

Warren on the map of Iowa

Iowa has 99 counties and county equivalents, each with its own records office. Shapes with a page are links.

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 CountyWashington CountyWayne CountyWebster CountyWinnebago CountyWinneshiek CountyWoodbury CountyWorth CountyWright CountyWarren County Warren
Counties of Iowa · Warren highlighted

History

Formed in 1846 from Mahaska County

An old deed may name a county that no longer exists, or a boundary that has since moved.

Warren was established on January 13, 1846, by Iowa Territory from Non-County Area 3 attached to Mahaska County, though it was not fully organized at that time. When Iowa became a state in December 1846, Warren became an official county. The county was fully organized in 1849 after experiencing boundary adjustments with Polk County in 1847 and 1853.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries.

  1. 1846
    Warren County created Warren created by Iowa Territory from Non-County Area 3 attached to Mahaska; Warren not fully organized, not attached.
    from Mahaska
    · Iowa Terr. Laws 1845-1846, ch. 82, sec. 3/p. 74
  2. 1846
    Became part of Iowa Warren became an Iowa county when the state of Iowa was created from Iowa Territory. · U.S. Stat., vol. 9, ch. 1[1847]/p. 117
  3. 1847
    Lost territory Warren lost to Polk.
    to Polk
    · Iowa Acts 1846-1847, ch. 17, sec. 1/pp. 36-37
  4. 1849
    Changed Warren fully organized. · Swisher, "Organization of Counties," 576
  5. 1853
    Gained territory Warren gained from Polk.
    from Polk
    · Iowa Acts 1852-1853, ch. 18, secs. 1-2/pp. 40-41

Land and parcels

What the maps cover in Warren

Who publishes each layer, how good it is, and when we last checked.

Official
from the office that keeps the record
Good enough
a reliable statewide or national copy
Fallback
a guide only; check the official record
Missing
nothing public found yet

People and land

Warren by the Census

Population
52,403 2020 Census count
Housing units
20,857 2020 Census count
Land area
570 square miles
Water area
3.5 square miles
People per sq mi
92 population ÷ land area

Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.

Rules and offices

Who to ask before you build, dig or sell

Official county pages only. We link to them; we do not copy them, because they change.

Inside a city or town, permits usually come from that city rather than the county.

Records

Permits

Zoning and code

GIS and maps

County government

See your own lot on these maps

Open Warren County on Parcel Chart's free map and click your parcel. Save it with a free account; the full record of your place (site map, projects, documents) is Pro, in early access.

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Questions

Common questions about Warren County

When was Warren County founded?
Warren County was founded in 1846, formed from Mahaska County, and named after Joseph Warren.
What is the county seat of Warren County?
The county seat of Warren County is Indianola.
Is there an online parcel map for Warren County?
Yes. A public source publishes a parcel map of 35,498 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Warren County's boundary or name changed?
Warren County was created in 1846 from Mahaska County. Since then the Atlas of Historical County Boundaries records 4 later changes, chiefly involving Polk County.
Who issues building permits in Warren County?
The county's page on building permits: Driver's License/Permits - Warren County, Iowa. Inside a city or town, ask that city first.
Who issues septic and well permits in Warren County?
The county's page on septic systems and wells: Contact.
Is my lot in a flood zone?
We do not have flood maps for Warren County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.

Nearby

Counties next door