County · code 46025
Clark CountySouth Dakota
Clark County is a county in South Dakota with its county seat in Clark. The county was founded in 1873 and named after Newton Clark.
- Founded1873
- County seatClark
- Named forNewton Clark
- Land area958 sq mi + 10 sq mi water
- Population3,837 2020 Census
- Parcels mapped7,623 checked 15 October 2026
Where it is
Clark on the map of South Dakota
South Dakota has 66 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Founded in 1873
An old deed may name a county that no longer exists, or a boundary that has since moved.
Clark County became a county in the state of South Dakota on November 2, 1889. On May 2, 1885, Clark lost territory to Day County.
- 1885Lost territory Clark lost to Day. · Dak. Terr. Laws 1885, 16th sess., ch. 12, secs. 1-2, 10-11/pp. 235-237
- 1889Became part of South Dakota Clark became a county in the state of South Dakota. · U.S. Stat., vol. 25, ch. 180[1889]/pp. 676-684; U.S. Stat., vol. 26, no. 5/pp. 1548-1549; Swindler, 9:107-109; Van Zandt, 134
Land and parcels
What the maps cover in Clark
Who publishes each layer, how good it is, and when we last checked.
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Parcels Good enough
Lot lines and tax-map numbers for 7,623 parcels from Clark County. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 15 October 2026 -
Address points Missing
No public address points layer found for Clark County yet.
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Buildings Reference
Roof outlines traced from aerial imagery from FEMA Response Geospatial Office with Oak Ridge National Laboratory (ORNL). Good for seeing what is on a lot; not accurate enough to set a fence from.
checked 18 October 2026
- 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
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
- County government
The official website of Clark County.
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.
Questions
Common questions about Clark County
- When was Clark County founded?
- Clark County was founded in 1873, and named after Newton Clark.
- What is the county seat of Clark County?
- The county seat of Clark County is Clark.
- Is there an online parcel map for Clark County?
- Yes. Clark County publishes a parcel map of 7,623 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Clark County's boundary or name changed?
- Atlas of Historical County Boundaries records 2 changes for Clark County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Day. 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