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County · code 29053

Cooper CountyMissouri

Cooper County is a county in Missouri with its seat in Boonville, formed in 1819.

  • Founded1819
  • County seatBoonville
  • Named forSarshell Cooper
  • Land area565 sq mi + 4.4 sq mi water
  • Population17,103 2020 Census
  • Parcels mapped12,418 checked 14 October 2026
Open the free map Click any parcel in Cooper County: acreage, parcel id, address and who publishes the map. No sign-in.

Updated

MoniteauHowardMorganPettisSalineBoone Boonville Census outline · seat marked

Where it is

Cooper 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 · Cooper highlighted

History

Formed in 1819 from Howard County

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

Cooper County was formed in 1819 from Howard County, and named after Sarshell Cooper. Boonville is the county seat.

Deeds and plats from before 1819 for land now in Cooper County may have been recorded in Howard County.

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

  1. 1819
    Cooper County created Cooper created from Howard.
    from Howard
    · Mo. Terr Laws 1818-1819, ch. 233, secs. 1, 10/pp. 594-598
  2. 1821
    Lost territory Cooper lost to creation of Cole, Lillard (extinct), and Saline.
    to Coleto Lillardto Saline
    · Mo. Laws 1820-1821, ch. 16, secs. 1, 11/pp. 31-3 and ch. 10, secs. 1, 6/pp. 13-15
  3. 1833
    Lost territory Cooper lost to creation of Morgan.
    to Morgan
    · Mo. Laws 1832-1833, pub., ch. 29, sec. 1/pp. 52-53
  4. 1833
    Lost territory Cooper lost to creation of Pettis.
    to Pettis
    · Mo. Laws 1832-1833, pub., ch. 30, sec. 1/pp. 53-54
  5. 1845
    Lost territory Cooper lost to Saline.
    to Saline
    · Mo. Rev. Stat. 1845, secs. 9, 69/pp. 134,143

Land and parcels

What the maps cover in Cooper

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

Cooper by the Census

Population
17,103 2020 Census count
Housing units
7,281 2020 Census count
Land area
565 square miles
Water area
4.4 square miles
People per sq mi
30 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

Cooper 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

Open Cooper 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 Cooper County

When was Cooper County founded?
Cooper County was founded in 1819, formed from Howard County, and named after Sarshell Cooper.
What is the county seat of Cooper County?
The county seat of Cooper County is Boonville.
Is there an online parcel map for Cooper County?
Yes. Cooper County publishes a parcel map of 12,418 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
Has Cooper County's boundary or name changed?
Cooper County was created in 1819 from Howard County. Since then the Atlas of Historical County Boundaries records 4 later changes, chiefly involving Saline County, Cole County and Lillard County.
Is my lot in a flood zone?
We do not have flood maps for Cooper 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