Wisconsin · FIPS 55077 · County seat: Montello
Marquette County, WI GIS & Parcel Viewer
Parcel lookups for Marquette County start at the Marquette County WinGIS Xtreme viewer. This page gives you that official link, notes on how the viewer works, and links to the counties next door.
Open the Marquette County parcel map ↗
Opens marquettecowi.wgxtreme.com in a new tab. We link out and never embed or copy parcel data.
Map and county facts
| Official map | Marquette County WinGIS Xtreme viewer |
|---|---|
| Type | County-run map |
| Website | marquettecowi.wgxtreme.com |
| Access | Free, no login (checked Oct 2026) |
| County seat | Montello |
| Population | 15,838 (2023 Census Bureau estimate) |
| Land area | 456 sq mi |
| FIPS code | 55077 |
Who runs this map
It is a county-level map: Marquette County or the company it hires keeps the parcel layer up to date. As of our October 2026 test, anyone could open it without signing in or paying.
How to use the Marquette County viewer
- Open the official link; the map is hosted on WinGIS Xtreme, a vendor platform used by 17 counties in our directory.
- Accept any disclaimer, then use the search tool to find a street address, owner or parcel ID.
- Click a parcel to view its attributes.
- Use the layer or basemap controls to add aerials and other layers where the county provides them.
Rural addresses don't always geocode well. When that happens, zoom in by hand and click the parcel, or search by owner name.
The county in brief
Marquette County had an estimated 15,838 residents in 2023, according to the Census Bureau. With about 456 square miles of land, that works out to roughly 35 people per square mile. Among Wisconsin's 72 counties, it is the 64th largest by population. The county seat is Montello.
Counties next to Marquette County
Marquette County shares a border with the counties below. Each link has its own official map:
A note on accuracy
Treat the map as a guide, not a boundary survey: parcel outlines are often shifted a bit from the real corners. A licensed surveyor settles exact lines.