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County · code 29037

Cass CountyMissouri

Cass County is in Missouri, with its seat in Harrisonville. The county was created in 1833 from Jackson and Lafayette counties.

  • Founded1833
  • County seatHarrisonville
  • Named forLewis Cass
  • Land area697 sq mi + 5.8 sq mi water
  • Population107,824 2020 Census
Open the free map Click any parcel in Cass County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

JacksonBatesMiami, KSJohnsonHenry Harrisonville Census outline · seat marked

Where it is

Cass 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 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 CountyPettis 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 cityCass County Cass
Counties of Missouri · Cass highlighted

History

Formed in 1833 from Jackson County and Lafayette County

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

Van Buren County was created on January 16, 1833, from Jackson and Lafayette counties but was not fully organized and was attached to Jackson for all civil and military purposes. In 1835, Van Buren was fully organized and detached from Jackson, while Bates County was attached to it for administrative purposes. Van Buren was renamed Cass on February 2, 1849, after Lewis Cass. Cass County's boundaries changed several times through the 1830s and 1850s as new counties were created or reorganized.

Boundary changes from the Newberry Library, Atlas of Historical County Boundaries; the 5 that matter most are shown first.

  1. 1833
    Cass County created Van Buren (now Cass) created from Jackson and Lafayette; Van Buren not fully organized, attached to Jackson "for all civil and military purposes."
    from Jacksonfrom Lafayette
    · Mo. Laws 1832-1833, pub., ch. 27, sec. 2/p. 50
  2. 1834
    Lost territory Van Buren (now Cass) lost to creation of Johnson.
    to Johnson
    · Mo. Laws 1834-1835, priv. and loc., pp. 37-38
  3. 1835
    Gained territory Van Buren (now Cass) gained from Jackson; Van Buren fully organized, detached from Jackson. Bates attached to Van Buren "for all civil and military purposes."
    from Jacksonfrom Bates
    · Mo. Laws 1834-1835, priv. and loc., pp. 44-45
  4. 1841
    Lost territory Van Buren (now Cass) lost to Bates.
    to Bates
    · Mo. Laws 1840-1841, pub., p. 46
  5. 1849
    Renamed Van Buren renamed Cass.
    formerly Van Buren
    · Mo. Laws 1848-1849, pub., pp. 20-30
Show all 11 changes (6 more)
  1. 1833
    Cass County created Van Buren (now Cass) created from Jackson and Lafayette; Van Buren not fully organized, attached to Jackson "for all civil and military purposes."
    from Jacksonfrom Lafayette
    · Mo. Laws 1832-1833, pub., ch. 27, sec. 2/p. 50
  2. 1834
    Lost territory Van Buren (now Cass) lost to creation of Johnson.
    to Johnson
    · Mo. Laws 1834-1835, priv. and loc., pp. 37-38
  3. 1835
    Gained territory Van Buren (now Cass) gained from Jackson; Van Buren fully organized, detached from Jackson. Bates attached to Van Buren "for all civil and military purposes."
    from Jacksonfrom Bates
    · Mo. Laws 1834-1835, priv. and loc., pp. 44-45
  4. 1841
    Changed Bates fully organized, detached from Van Buren (now Cass).
    Bates
    · Mo. Laws 1840-1841, pub., secs. 34-36/p. 36
  5. 1841
    Lost territory Van Buren (now Cass) lost to Bates.
    to Bates
    · Mo. Laws 1840-1841, pub., p. 46
  6. 1847
    Lost territory Van Buren (now Cass) lost to creation of Donaldson (extinct); Donaldson not fully organized, part attached to Van Buren "for all civil and military purposes."
    to Donaldson
    · Mo. Laws 1846-1847, pub., p. 17
  7. 1849
    Renamed Van Buren renamed Cass.
    formerly Van Buren
    · Mo. Laws 1848-1849, pub., pp. 20-30
  8. 1849
    Changed Creation of Donaldson (extinct) repealed; Cass regained part of Donaldson (extinct) that it previously held.
    Donaldson
    · Mo. Laws 1848-1849, pub., p. 32
  9. 1851
    Lost territory Cass lost to creation of Vernon (original, extinct).
    to Vernon
    · Atcheson, 133-134; History of Vernon Co., 192-193; Mo. Laws 1850-1851, pub., pp. 188-189; Mo. Reports 17: 521-529
  10. 1853
    Changed Creation of Vernon (original, extinct) ruled unconstitutional by state supreme court; Cass regained part of Vernon (original, extinct) that it previously held.
    Vernon
    · Mo. Reports 17: 521-529
  11. 1855
    Lost territory Cass lost to Bates.
    to Bates
    · Mo. Laws 1854-1855, pub., pp. 11-12

Land and parcels

What the maps cover in Cass

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

Cass by the Census

Population
107,824 2020 Census count
Housing units
43,445 2020 Census count
Land area
697 square miles
Water area
5.8 square miles
People per sq mi
155 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

County government

See your own lot on these maps

Open Cass 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 Cass County

When was Cass County founded?
Cass County was founded in 1833, formed from Jackson County and Lafayette County, and named after Lewis Cass.
What is the county seat of Cass County?
The county seat of Cass County is Harrisonville.
Is there an online parcel map for Cass County?
Not that we have found yet. Lot lines and owners of record are kept by the county assessor's office. When a public parcel map appears, it shows here.
Has Cass County's boundary or name changed?
Cass County was created in 1833 from Jackson County and Lafayette County. Since then the Atlas of Historical County Boundaries records 10 later changes, chiefly involving Bates County, Donaldson County and Vernon County. It was formerly called Van Buren.
Is my lot in a flood zone?
We do not have flood maps for Cass 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