County GIS · State lines · October 19, 2026
Michigan–Wisconsin Border Counties and Their Parcel Maps
All 28 counties on the Michigan–Wisconsin line, with seats, 2023 populations and a link to each official parcel map, plus what changes at the state line.
Looking for the counties on the Michigan–Wisconsin border and their parcel maps? According to the Census Bureau's county adjacency file, 14 Michigan counties touch 14 Wisconsin counties along the line. Each one keeps its own property records and its own parcel viewer, so land near the line often means checking two counties in two states.
A farm, hunting tract or lake lot can sit in one state while the road, the neighbors or the rest of the property are in the other. This page lists every county that touches the line on either side, with links to each official parcel map.
Michigan–Wisconsin border at a glance
- Counties on the line: 28 (14 in Michigan, 14 in Wisconsin)
- With a verified public parcel viewer in our directory: 28 of 28
- Residents, 2023 estimates: about 842,624 on the Michigan side and 1,726,406 on the Wisconsin side
- Most populous on each side: Ottawa County, MI (303,372) and Milwaukee County, WI (916,205)
- Largest by land area: Ontonagon County, MI (1,311 sq mi) and Marinette County, WI (1,399 sq mi)
Michigan counties on the line
| County | Seat | Land (sq mi) | 2023 pop. | Parcel viewer |
|---|---|---|---|---|
| Allegan County | Allegan | 825 | 121,939 | ArcGIS Web AppBuilder |
| Benzie County | Beulah | 320 | 18,441 | county web map |
| Delta County | Escanaba | 1,171 | 36,790 | county web map |
| Dickinson County | Iron Mountain | 761 | 25,982 | county web map |
| Gogebic County | Bessemer | 1,102 | 14,224 | county web map |
| Iron County | Crystal Falls | 1,166 | 11,740 | county web map |
| Leelanau County | Suttons Bay | 347 | 23,019 | ArcGIS Web AppBuilder |
| Manistee County | Manistee | 542 | 25,562 | ArcGIS Experience Builder |
| Mason County | Ludington | 495 | 29,159 | ArcGIS Experience Builder |
| Menominee County | Menominee | 1,044 | 22,945 | county web map |
| Muskegon County | Muskegon | 504 | 176,564 | county web map |
| Oceana County | Hart | 538 | 26,981 | ArcGIS Experience Builder |
| Ontonagon County | Ontonagon | 1,311 | 5,906 | county web map |
| Ottawa County | Grand Haven | 564 | 303,372 | county web map |
Wisconsin counties on the line
| County | Seat | Land (sq mi) | 2023 pop. | Parcel viewer |
|---|---|---|---|---|
| Ashland County | Ashland | 1,045 | 16,079 | WinGIS Xtreme |
| Door County | Sturgeon Bay | 482 | 30,562 | county web map |
| Florence County | Florence | 488 | 4,682 | county web map |
| Forest County | Crandon | 1,014 | 9,325 | WinGIS Xtreme |
| Iron County | Hurley | 758 | 6,228 | county web map |
| Kenosha County | Kenosha | 272 | 167,488 | county web map |
| Kewaunee County | Kewaunee | 342 | 20,690 | county web map |
| Manitowoc County | Manitowoc | 589 | 81,331 | county web map |
| Marinette County | Marinette | 1,399 | 42,106 | county web map |
| Milwaukee County | Milwaukee | 241 | 916,205 | county web map |
| Ozaukee County | Port Washington | 233 | 93,460 | county web map |
| Racine County | Racine | 333 | 196,613 | ArcGIS Experience Builder |
| Sheboygan County | Sheboygan | 512 | 117,752 | ArcGIS Experience Builder |
| Vilas County | Eagle River | 858 | 23,885 | ArcGIS Instant Apps |
Which counties face each other
Here is who borders whom across the line, based on the Census Bureau adjacency file:
- Allegan County, MI borders Kenosha County, WI, Racine County, WI
- Benzie County, MI borders Door County, WI, Kewaunee County, WI
- Delta County, MI borders Door County, WI
- Dickinson County, MI borders Florence County, WI, Marinette County, WI
- Gogebic County, MI borders Ashland County, WI, Iron County, WI, Vilas County, WI
- Iron County, MI borders Florence County, WI, Forest County, WI, Vilas County, WI
- Leelanau County, MI borders Door County, WI
- Manistee County, MI borders Kewaunee County, WI, Manitowoc County, WI
- Mason County, MI borders Manitowoc County, WI, Sheboygan County, WI
- Menominee County, MI borders Door County, WI, Marinette County, WI
- Muskegon County, MI borders Milwaukee County, WI, Ozaukee County, WI
- Oceana County, MI borders Ozaukee County, WI, Sheboygan County, WI
- Ontonagon County, MI borders Ashland County, WI
- Ottawa County, MI borders Milwaukee County, WI, Racine County, WI
What changes when you cross the line
- Different viewers. On the Michigan side the official maps run on: county web map (9); ArcGIS Experience Builder (3); ArcGIS Web AppBuilder (2). On the Wisconsin side: county web map (9); WinGIS Xtreme (2); ArcGIS Experience Builder (2); ArcGIS Instant Apps (1). Search boxes, parcel ID formats and the details shown in pop-ups will differ.
- Different records offices. Deeds, plats and tax bills are kept by the county where the parcel sits.
- Different rules. Zoning, septic permits and property tax are set locally and by each state, so check with the county on the side where you plan to build or buy.
Researching a tract that crosses the line
- Find the parcel in both counties' viewers. Each side will show only its own piece, with its own parcel number.
- Pull the recorded deed from each county's register or recorder, since each county records only the land inside its own boundary.
- Expect two tax bills, one from each county, and check each state's rules for homestead or farm exemptions.
- For a sale, a fence or a building permit, hire a licensed surveyor familiar with the line; tax-map lines are drawings, not surveys.
A quick way to check which side a spot is on
Tap the spot on the Platbookmapper Land Map. Its land report names the county and links straight to that county's parcel viewer, plus FEMA flood, USGS elevation, USDA soil and wetland results.
Related guides
More: Michigan counties · Wisconsin counties
Sources
- U.S. Census Bureau county adjacency file, used for which counties share the line.
- U.S. Census Bureau Gazetteer files, 2020 county land area.
- U.S. Census Bureau, Population Estimates Program, county totals, Vintage 2023 (July 1, 2023 estimates)
- Platbookmapper county GIS directory (live data file behind our county pages, pulled October 19, 2026) for each county's official parcel viewer.
- County seats: Wikidata (county seat property), cross-checked against Census place names.