County · code 46061
Hanson CountySouth Dakota
Hanson County is a county in South Dakota, formed in 1873 and located in the state's eastern region. The county seat is Alexandria.
- Founded1873
- County seatAlexandria
- Land area435 sq mi + 0.8 sq mi water
- Population3,461 2020 Census
- Parcels mapped4,289 checked 15 October 2026
Where it is
Hanson 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.
Hanson County was established in Dakota Territory in 1873, and later exchanged territory with Davison County on October 11, 1881. On November 2, 1889, Hanson County became a county in the state of South Dakota.
- 1881Exchanged territory Hanson exchanged with Davison. · Dak. Terr. Laws 1881, 14th sess., ch. 42/pp. 46-50; Andreas, 170-171
- 1889Became part of South Dakota Hanson 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 Hanson
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 4,289 parcels from Hanson 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 Hanson 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
Hanson 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 Hanson County.
See your own lot on these maps
Open Hanson 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 Hanson County
- When was Hanson County founded?
- Hanson County was founded in 1873.
- What is the county seat of Hanson County?
- The county seat of Hanson County is Alexandria.
- Is there an online parcel map for Hanson County?
- Yes. Hanson County publishes a parcel map of 4,289 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Hanson County's boundary or name changed?
- Atlas of Historical County Boundaries records 2 changes for Hanson County. Since then the Atlas of Historical County Boundaries records 2 later changes, chiefly involving Davison County.
- Is my lot in a flood zone?
- We do not have flood maps for Hanson County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby