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County · code 29159

Pettis CountyMissouri

Pettis County is a county in Missouri with its seat in Sedalia. It was created on January 26, 1833.

  • Founded1833
  • County seatSedalia
  • Named forSpencer Darwin Pettis
  • Land area682 sq mi + 4.1 sq mi water
  • Population42,980 2020 Census
  • Parcels mapped25,524 checked 15 October 2026
Open the free map Click any parcel in Pettis County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

SalineBentonCooperMorganJohnson Sedalia Census outline · seat marked

Where it is

Pettis on the map of Missouri

Missouri has 115 counties and county equivalents, each with its own records office. Shapes with a page are links.

Adair CountyAndrew CountyAtchison CountyAudrain CountyBarry CountyBarton CountyBates CountyBenton CountyBollinger CountyBoone CountyBuchanan CountyButler CountyCaldwell CountyCallaway CountyCamden CountyCape Girardeau CountyCarroll CountyCarter CountyCass CountyCedar CountyChariton CountyChristian CountyClark CountyClay CountyClinton CountyCole CountyCooper CountyCrawford CountyDade CountyDallas CountyDaviess CountyDeKalb CountyDent CountyDouglas CountyDunklin CountyFranklin CountyGasconade CountyGentry CountyGreene CountyGrundy CountyHarrison CountyHenry CountyHickory CountyHolt CountyHoward CountyHowell CountyIron CountyJackson CountyJasper CountyJefferson CountyJohnson CountyKnox CountyLaclede CountyLafayette CountyLawrence CountyLewis CountyLincoln CountyLinn CountyLivingston CountyMcDonald CountyMacon CountyMadison CountyMaries CountyMarion CountyMercer CountyMiller CountyMississippi CountyMoniteau CountyMonroe CountyMontgomery CountyMorgan CountyNew Madrid CountyNewton CountyNodaway CountyOregon CountyOsage CountyOzark CountyPemiscot CountyPerry CountyPhelps CountyPike CountyPlatte CountyPolk CountyPulaski CountyPutnam CountyRalls CountyRandolph CountyRay CountyReynolds CountyRipley CountySt. Charles CountySt. Clair CountySte. Genevieve CountySt. Francois CountySt. Louis CountySaline CountySchuyler CountyScotland CountyScott CountyShannon CountyShelby CountyStoddard CountyStone CountySullivan CountyTaney CountyTexas CountyVernon CountyWarren CountyWashington CountyWayne CountyWebster CountyWorth CountyWright CountySt. Louis cityPettis County Pettis
Counties of Missouri · Pettis highlighted

History

Formed in 1833 from Cooper County, Morgan County, St. Clair County and Saline County

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

Pettis County was created from Cooper, Morgan, St. Clair, and Saline counties on January 26, 1833. It was named after Spencer Darwin Pettis. In 1845, the county gained land from Benton County.

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

  1. 1833
    Pettis County created Pettis created from Cooper, Morgan, St. Clair, Saline, and Non-County Area 15. Non-County Area 15 eliminated.
    from Cooperfrom Morganfrom St. Clairfrom Saline
    · Mo. Laws 1832-1833, pub., ch. 30, sec. 1/pp. 53-54
  2. 1834
    Lost territory Pettis lost to creation of Non-County Area 20. · Mo. Laws 1833-1834, pub., p. 416
  3. 1845
    Gained territory Pettis gained from Benton.
    from Benton
    · Mo. Laws 1844-1845, loc. and priv., p. 42

Land and parcels

What the maps cover in Pettis

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

Pettis by the Census

Population
42,980 2020 Census count
Housing units
18,563 2020 Census count
Land area
682 square miles
Water area
4.1 square miles
People per sq mi
63 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

Pettis 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 Pettis County

When was Pettis County founded?
Pettis County was founded in 1833, formed from Cooper County, Morgan County, St. Clair County and Saline County, and named after Spencer Darwin Pettis.
What is the county seat of Pettis County?
The county seat of Pettis County is Sedalia.
Is there an online parcel map for Pettis County?
Yes. Pettis County publishes a parcel map of 25,524 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Pettis County's boundary or name changed?
Pettis County was created in 1833 from Cooper County, Morgan County, St. Clair County and Saline County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Benton County.
Is my lot in a flood zone?
We do not have flood maps for Pettis 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