County · code 46091
Marshall CountySouth Dakota
Marshall County is a county in South Dakota with its seat in Britton. The county was created in 1885 and named after Marshall Vincent.
- Founded1885
- County seatBritton
- Named forMarshall Vincent
- Land area838 sq mi + 48 sq mi water
- Population4,306 2020 Census
- Parcels mapped10,621 checked 14 October 2026
Where it is
Marshall 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
Formed in 1885 from Day. County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Marshall County was created by Dakota Territory in 1885 from Day County. It became a county in the state of South Dakota in 1889.
- 1885Marshall County created Marshall created by Dakota Territory in present South Dakota from Day. · Dak. Terr. Laws 1885, 16th sess., ch. 12, secs. 1-2, 10-11/pp. 235-237
- 1889Became part of South Dakota Marshall 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
- 1891Boundary clarified Marshall boundaries redefined (no change).no change· S. Dak. Laws 1891, 2d sess., ch. 42/p. 102
Land and parcels
What the maps cover in Marshall
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 10,621 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
checked 14 October 2026 -
Address points Missing
No public address points layer found for Marshall 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
Marshall 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 Marshall County.
See your own lot on these maps
Open Marshall 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 Marshall County
- When was Marshall County founded?
- Marshall County was founded in 1885, formed from Day. County, and named after Marshall Vincent.
- What is the county seat of Marshall County?
- The county seat of Marshall County is Britton.
- Is there an online parcel map for Marshall County?
- Yes. A public source publishes a parcel map of 10,621 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Marshall County's boundary or name changed?
- Marshall County was created in 1885 from Day. County. Since then the Atlas of Historical County Boundaries records 1 later change.
- Is my lot in a flood zone?
- We do not have flood maps for Marshall County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby