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County · code 19033

Cerro Gordo CountyIowa

Cerro Gordo County is a county in Iowa with its seat in Mason City, formed on January 15, 1851.

  • Founded1851
  • County seatMason City
  • Named forBattle of Cerro Gordo
  • Land area568 sq mi + 6.8 sq mi water
  • Population43,127 2020 Census
  • Parcels mapped32,851 checked 16 October 2026
Open the free map Click any parcel in Cerro Gordo County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

FranklinFloydHancock Mason City Census outline · seat marked

Where it is

Cerro Gordo 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 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 CountyCerro Gordo County Cerro Gordo
Counties of Iowa · Cerro Gordo highlighted

History

Formed in 1851 from Delaware County and Polk County

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

Cerro Gordo was created from non-county areas attached to Delaware and Polk. The county was attached to Floyd for various purposes starting in February 1855 before becoming fully organized and detached in December 1855. Cerro Gordo was named after the Battle of Cerro Gordo.

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

  1. 1851
    Cerro Gordo County created Cerro Gordo created from Non-County Area 6 attached to Delaware and Non-County Area 9 attached to Polk; Cerro Gordo not fully organized, not attached.
    from Delawarefrom Polk
    · Iowa Acts 1850-1851, ch. 9, sec. 35/p. 35
  2. 1855
    Changed Cerro Gordo attached to Floyd "for judicial purposes".
    Floyd
    · Iowa Acts 1854-1855, ch. 111, sec. 5/p. 175
  3. 1855
    Changed Cerro Gordo's attachment to Floyd expanded to include "election, revenue, and judicial purposes."
    Floyd
    · Iowa Acts 1854-1855, ch. 84, secs. 1, 3/p. 123
  4. 1855
    Changed Cerro Gordo fully organized, detached from Floyd.
    Floyd
    · Swisher, "Organization of Counties," 574
  5. 1858
    Changed Worth detached from Mitchell, attached to Cerro Gordo "for judicial, election, and revenue purposes."
    WorthMitchell
    · Iowa Acts 1858, ch. 47, secs. 1, 3/p. 53
  6. 1858
    Changed Worth fully organized, detached from Cerro Gordo.
    Worth
    · Iowa Acts 1858, ch. 144, secs. 1-2/pp. 284-285; Swisher, "Organization of Counties," 576

Land and parcels

What the maps cover in Cerro Gordo

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

Cerro Gordo by the Census

Population
43,127 2020 Census count
Housing units
22,603 2020 Census count
Land area
568 square miles
Water area
6.8 square miles
People per sq mi
76 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

Cerro Gordo County's official site

We have found the county's site but not its offices yet; start there.

County government

See your own lot on these maps

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Questions

Common questions about Cerro Gordo County

When was Cerro Gordo County founded?
Cerro Gordo County was founded in 1851, formed from Delaware County and Polk County, and named after Battle of Cerro Gordo.
What is the county seat of Cerro Gordo County?
The county seat of Cerro Gordo County is Mason City.
Is there an online parcel map for Cerro Gordo County?
Yes. A public source publishes a parcel map of 32,851 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Cerro Gordo County's boundary or name changed?
Cerro Gordo County was created in 1851 from Delaware County and Polk County. Since then the Atlas of Historical County Boundaries records 5 later changes, chiefly involving Floyd County, Worth County and Mitchell County.
Is my lot in a flood zone?
We do not have flood maps for Cerro Gordo 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