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County · code 29045

Clark CountyMissouri

Clark County is a county in Missouri, with its seat in Kahoka, formed in 1836. The county was named after William Clark.

  • Founded1836
  • County seatKahoka
  • Named forWilliam Clark
  • Land area505 sq mi + 7.2 sq mi water
  • Population6,634 2020 Census
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Updated

LewisLee, IAVan Buren, IAScotlandKnoxHancock, IL Kahoka Census outline · seat marked

Where it is

Clark on the map of Missouri

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

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Counties of Missouri · Clark highlighted

History

Founded in 1836

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

Clark County was created on December 16, 1836, from Non-County Area 19. A territorial dispute arose when the Missouri legislature extended Clark's northern boundary into Iowa Territory in 1838, overlapping the area of Van Buren County, Iowa. The U.S. Supreme Court settled the boundary dispute in 1849 by choosing the Indian boundary line established in 1816, which ended Clark's overlap with Van Buren County. Non-County Area 26 was attached to Clark in 1837 but was lost to the creation of Scotland County in 1841.

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

  1. 1836
    Clark County created Clark created from Non-County Area 19. · Mo. Laws 1836-1837, pub., pp. 47-48
  2. 1837
    Clark County created Non-County Area 26 created from Non-County Area 19, attached to Clark "for civil and military purposes." · Mo. Laws 1836-1837, pub., pp. 48-49
  3. 1838
    Clark County created Missouri legislature extended Clark's boundary line north of the commonly accepted boundary between Missouri and Iowa Territory (the Indian boundary line established in 1816); the extension overlapped Iowa's Van Buren, and created a dispute finally settled in Iowa's favor by the U.S. Supreme Court in 1849. Iowa maintained control of the area throughout the dispute.
    from Van Burenfrom U.s.
    · Mo. Laws 1838-1839, pub., p. 22
  4. 1841
    Lost territory Clark lost attached Non-County Area 26 to creation of Scotland; Non-County Area 26 eliminated.
    to Scotland
    · Mo. Laws 1840-1841, pub., sec. 32/p. 36
  5. 1849
    Changed U.S. Supreme Court settled boundary dispute between Missouri and Iowa dating from 15 December 1838, by rejecting both states' claims, choosing instead the Indian boundary line run and marked by John C. Sullivan in 1816 (the commonly accepted boundary before the dispute arose and the present boundary between the two states). The decision ended Clark's overlap of the Iowa county of Van Buren.
    U.s.Van Buren
    · Landers, 647-648; Thomas, 269-270

Land and parcels

What the maps cover in Clark

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

Clark by the Census

Population
6,634 2020 Census count
Housing units
3,216 2020 Census count
Land area
505 square miles
Water area
7.2 square miles
People per sq mi
13 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

Zoning and code

County government

See your own lot on these maps

Open Clark 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 Clark County

When was Clark County founded?
Clark County was founded in 1836, and named after William Clark.
What is the county seat of Clark County?
The county seat of Clark County is Kahoka.
Is there an online parcel map for Clark County?
Not that we have found yet. Lot lines and owners of record are kept by the assessor's office. When a public parcel map appears, it shows here.
Has Clark County's boundary or name changed?
Clark County was created in 1836. Since then the Atlas of Historical County Boundaries records 4 later changes, chiefly involving U.s. County, Van Buren County and Scotland County.
Is my lot in a flood zone?
We do not have flood maps for Clark 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