County · code 46111
Sanborn CountySouth Dakota
Sanborn County is in South Dakota, with its county seat in Woonsocket. The county was created on May 1, 1883, from Miner County.
- Founded1883
- County seatWoonsocket
- Land area569 sq mi + 1.2 sq mi water
- Population2,330 2020 Census
- Parcels mapped5,090 checked 15 October 2026
Where it is
Sanborn 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 1883 from Miner County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Sanborn County was created by Dakota Territory on May 1, 1883, from Miner County. On November 2, 1889, Sanborn became a county in the state of South Dakota.
- 1883Sanborn County created Sanborn created by Dakota Territory in present South Dakota from Miner. · Dak. Terr. Laws 1883, 15th sess., ch. 31/p. 46; Andreas, 169; History of Pioneer Sanborn County, 63
- 1889Became part of South Dakota Sanborn 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 Sanborn
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 5,090 parcels from Sanborn 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 Sanborn 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
Sanborn by the Census
Source: US Census Bureau, 2020 Census; US Census Bureau, 2020 Gazetteer Files. Not endorsed or certified by the Census Bureau.
See your own lot on these maps
Open Sanborn 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 Sanborn County
- When was Sanborn County founded?
- Sanborn County was founded in 1883, formed from Miner County.
- What is the county seat of Sanborn County?
- The county seat of Sanborn County is Woonsocket.
- Is there an online parcel map for Sanborn County?
- Yes. Sanborn County publishes a parcel map of 5,090 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Sanborn County's boundary or name changed?
- Sanborn County was created in 1883 from Miner 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 Sanborn County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby