WISCONSIN COUNTY PARCEL MAPS
Jefferson County parcel map and property owners
WI 2026 puts all 45,169 parcels in Jefferson County on your phone: owner names, site addresses, assessed values and acreage from the county’s 2025 tax roll. The county download is about 14 MB, and once it’s on your phone you can search it and tap any parcel with no signal.
The parcels cover 346,312 mapped acres across 27 towns, villages and cities, and 13 school districts. The most parcels are in the City of Watertown. The data is the State Cartographer’s Office V12 statewide parcel map, loaded from the county on February 9, 2026.
- Agricultural
- Productive forest
- Undeveloped / ag forest
- Residential
- Commercial / manufacturing
- Government-owned / county forest
- Other / unclassified
What the Jefferson County records include
Counties fill in the statewide schema differently. This is how complete Jefferson County’s 2025 records are:
| Field | Filled in |
|---|---|
| Owner name | 100% of parcels |
| Site (street) address | 74.9% of parcels |
| Assessed or estimated value | 93% of parcels |
| Assessed or deeded acres | 95.2% of parcels |
| Net property tax | 93% of parcels |
How the land is classed
By mapped area, Jefferson County is agricultural 64%, residential 16%, government-owned / county forest 10%, undeveloped / ag forest 5%. The median estimated fair market value of a residential parcel is $298,700, across 27,639 residential parcels with a value.
In WI 2026, open the legend and color the map by Class of Property to see the same picture, or by Estimated Fair Market Value to see where values rise and fall.
Deer season: public land and Managed Forest Law
The tax roll marks parcels that are government-owned or enrolled in Wisconsin’s forest tax programs. In Jefferson County:
- Federal-owned: 297 acres in 15 parcels
- State-owned: 23,255 acres in 875 parcels
- County-owned: 1,729 acres in 268 parcels
- No parcels are listed as open Managed Forest Law land.
- Managed Forest Law, closed (no public access without permission): 4,592 acres
In WI 2026, color the map by Auxiliary Class of Property to see these parcels, and tap one for the owner and acreage. The acreages are whole-parcel areas from the tax roll: a parcel that is only partly enrolled counts in full, and the tax roll doesn’t show posted areas or access routes. Before you hunt, check the DNR’s map of private forest land open to the public and the signs on the ground.
Towns, villages and cities in Jefferson County
Every parcel carries its municipality, so you can search a town name in WI 2026 or filter the attribute table to one place. Parcel counts in the 2025 data:
- City of Watertown 5,382
- City of Fort Atkinson 4,888
- Town of Koshkonong 3,124
- City of Jefferson 3,032
- Town of Ixonia 2,564
- City of Lake Mills 2,517
- Town of Oakland 2,253
- Town of Jefferson 1,820
- Town of Milford 1,660
- Town of Sullivan 1,633
- Town of Lake Mills 1,621
- Town of Watertown 1,581
- City of Waterloo 1,432
- Town of Concord 1,333
- Town of Palmyra 1,281
- Village of Johnson Creek 1,227
- Town of Farmington 1,219
- Town of Aztalan 1,123
- Town of Sumner 1,090
- Town of Waterloo 1,038
- Town of Hebron 1,014
- Village of Palmyra 833
- Town of Cold Spring 808
- City of Whitewater 340
- Village of Sullivan 304
- Village of Cambridge 46
- Village of Lac la Belle 6
Working near the county line?
Jefferson County borders Dane County, Dodge County, Rock County, Walworth County and Waukesha County. Download the neighboring counties too, and WI 2026 searches across all of them at once.
Where the data comes from
Parcel data is the Wisconsin Statewide Parcel Map Database (V12), a public-domain product of the Wisconsin Land Information Program and the State Cartographer’s Office, UW–Madison, built from Jefferson County’s 2025 tax roll. It is a snapshot, not a live feed: for a sale, a survey or a tax question, check with Jefferson County directly.