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County · code 19161

Sac CountyIowa

Sac County is in Iowa and was established in 1851 as part of the state's expansion into new territory. The county seat is Sac City.

  • Founded1851
  • County seatSac City
  • Named forSauk people
  • Land area575 sq mi + 3.3 sq mi water
  • Population9,814 2020 Census
  • Parcels mapped18,834 checked 15 October 2026
Open the free map Click any parcel in Sac County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

Buena VistaIdaCalhoun Sac City Census outline · seat marked

Where it is

Sac 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 CountyScott CountyShelby CountySioux CountyStory CountyTama CountyTaylor CountyUnion CountyVan Buren CountyWapello CountyWarren CountyWashington CountyWayne CountyWebster CountyWinnebago CountyWinneshiek CountyWoodbury CountyWorth CountyWright CountySac County Sac
Counties of Iowa · Sac highlighted

History

Formed in 1851 from Polk County

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

Sac County was created from Polk County on January 15, 1851, but remained unorganized and unattached for several years. Between 1853 and 1856, the county was temporarily attached to Woodbury County and then Greene County for revenue, election, and judicial purposes before being fully organized and detached from Greene County on April 7, 1856. From 1864 to 1870, Ida County was attached to Sac County for judicial purposes; Ida was detached when it became fully organized.

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

  1. 1851
    Sac County created Sac created from Non-County Area 9 attached to Polk; Sac not fully organized, not attached.
    from Polk
    · Iowa Acts 1850-1851, ch. 9, sec. 21/p. 32
  2. 1853
    Changed Sac attached to Woodbury "for revenue, election, and judicial purposes".
    Woodbury
    · Iowa Acts 1852-1853, ch. 8, sec. 14/p. 24
  3. 1855
    Changed Sac detached from Woodbury, attached to Greene "for election, judicial, and revenue purposes."
    WoodburyGreene
    · Iowa Acts. 1854-1855, ch. 142, sec. 1/p. 211
  4. 1856
    Changed Sac fully organized, detached from Greene.
    Greene
    · Swisher, "Organization of Counties," 576
  5. 1864
    Changed Ida attached to Sac "for judicial purposes."
    Ida
    · Iowa Acts 1864, ch. 47, secs. 2, 9/pp. 47-49
  6. 1870
    Changed Ida fully organized, detached from Sac when judicial attachments of 30 March 1864 were repealed.
    Ida
    · Iowa Acts 1870, ch. 2, secs. 3-4/pp. 3-4

Land and parcels

What the maps cover in Sac

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

Sac by the Census

Population
9,814 2020 Census count
Housing units
5,118 2020 Census count
Land area
575 square miles
Water area
3.3 square miles
People per sq mi
17 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.

Zoning and code

County government

See your own lot on these maps

Open Sac 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 Sac County

When was Sac County founded?
Sac County was founded in 1851, formed from Polk County, and named after Sauk people.
What is the county seat of Sac County?
The county seat of Sac County is Sac City.
Is there an online parcel map for Sac County?
Yes. A public source publishes a parcel map of 18,834 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Sac County's boundary or name changed?
Sac County was created in 1851 from Polk County. Since then the Atlas of Historical County Boundaries records 5 later changes, chiefly involving Greene County, Ida County and Woodbury County.
Is my lot in a flood zone?
We do not have flood maps for Sac 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