County · code 55045
Green CountyWisconsin
Green County is in Wisconsin and has its seat in Monroe. It was created on March 4, 1837, from Iowa Territory and named after Nathanael Greene.
- Founded1837
- County seatMonroe
- Named forNathanael Greene
- Land area584 sq mi + 0.5 sq mi water
- Population37,093 2020 Census
- Parcels mapped27,967 checked 16 October 2026
Where it is
Green on the map of Wisconsin
Wisconsin has 72 counties and county equivalents, each with its own records office. Shapes with a page are links.
History
Formed in 1837 from Iowa County
An old deed may name a county that no longer exists, or a boundary that has since moved.
Green County was created by Wisconsin Territory from Iowa and Non-County Area 2 on March 4, 1837. It became a county in the state of Wisconsin on May 29, 1848.
- 1837Green County created Green created by Wisconsin Territory from Iowa and Non-County Area 2. · Wis. Terr. Laws 1836, no. 31, secs. 1-2, 4-6, 9/pp. 97-99
- 1848Became part of Wisconsin Green became a county in the state of Wisconsin. · U.S. Stat., vol. 9, ch. 89 [1846]/pp. 56-58, and ch. 50 [1848]/pp. 233-235; Van Zandt, 128, 130
Land and parcels
What the maps cover in Green
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 27,967 parcels. Drawn for tax purposes: usually within a few feet of a survey, but not a survey.
edited 15 October 2026 · checked 16 October 2026 -
Address points Missing
No public address points layer found for Green 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
Green 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
Green 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 Green County.
See your own lot on these maps
Open Green 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 Green County
- When was Green County founded?
- Green County was founded in 1837, formed from Iowa County, and named after Nathanael Greene.
- What is the county seat of Green County?
- The county seat of Green County is Monroe.
- Is there an online parcel map for Green County?
- Yes. A public source publishes a parcel map of 27,967 parcels, rated good enough here. You can click any parcel on it in Parcel Chart's free map, no sign-in needed.
- Has Green County's boundary or name changed?
- Green County was created in 1837 from Iowa 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 Green County yet. Look up the address on FEMA's Flood Map Service Center, which shows the effective flood map for any lot.
Nearby