County · code 19191
Winneshiek CountyIowa
Winneshiek County is in Iowa with its county seat in Decorah. The county was created in 1847 and fully organized in 1851.
- Founded1847
- County seatDecorah
- Named forWinneshiek
- Land area690 sq mi + 0.3 sq mi water
- Population20,070 2020 Census
- Parcels mapped21,356 checked 15 October 2026
Where it is
Winneshiek on the map of Iowa
Iowa has 99 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Founded in 1847
An old deed may name a county that no longer exists, or a boundary that has since moved.
Winneshiek County was created on February 20, 1847 from Non-County Area 10, which was then eliminated. The county was fully organized on March 1, 1851.
- 1847Winneshiek County created Winneshiek created from Non-County Area 10; Non-County-Area 10 eliminated. Winneshiek not fully organized, not attached. · Iowa Acts 1846-1847, ch. 66, secs. 1-2/p. 75
- 1851Changed Winneshiek fully organized. · Iowa Acts 1850-1851, ch. 11, sec. 1/pp. 39-41
Land and parcels
What the maps cover in Winneshiek
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 21,356 parcels. 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 Winneshiek 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
Winneshiek 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
Winneshiek County's official site
We have found the county's site but not its offices yet; start there.
County government
- County government
The official website of Winneshiek County.
See your own lot on these maps
Open Winneshiek 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 Winneshiek County
- When was Winneshiek County founded?
- Winneshiek County was founded in 1847, and named after Winneshiek.
- What is the county seat of Winneshiek County?
- The county seat of Winneshiek County is Decorah.
- Is there an online parcel map for Winneshiek County?
- Yes. A public source publishes a parcel map of 21,356 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Winneshiek County's boundary or name changed?
- Winneshiek County was created in 1847. 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 Winneshiek County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby