Blog · October 14, 2026 · Wisconsin
Port Washington GIS Map, Wisconsin: a how-to
Parcel data for Port Washington comes from the county, and the viewer is free.
Main page: Ozaukee County, WI GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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For any lot around Belgium, a look at the Port Washington GIS map gives you lines, owner names and parcel numbers. What this Port Washington guide covers: where that map lives, the fastest ways to search, and the limits worth knowing.
The official viewer behind the Port Washington GIS map
For a parcel near Cedarburg, some cities also run their own GIS portal for utilities or zoning; that can add detail on top of the county map.
Pulling up a parcel
Begin with the Ozaukee County parcel viewer; it covers each tax parcel in the county, Grafton included. Without an address in hand, follow Interstate 43 on the aerial until the lines appear, then click inside the one you want. For acreage around Cedarburg, save the parcel ID before closing the panel; every records desk in the county asks for it first.
Recorded documents worth pulling
The map is an index, not the title: deeds, subdivision plats and easements covering ground around Newburg sit with the Register of Deeds. Long-held tracts around Fredonia may sit on a long string of deeds, so a title company earns its fee on a real sale.
Before you lean on the lines
The acreage figure is a tax-roll number; just a licensed surveyor sets the real lines on land around Cedarburg. In and around Grafton, owner names and values update on a schedule, so a deed recorded last month may not show yet.
Where Port Washington fits in
Port Washington sits in Ozaukee County, Wisconsin, and the county assessor maps its lots. As the county seat, Port Washington hosts the courthouse, which puts the Register of Deeds close by. On ground around Cedarburg, the municipality handles things like zoning, permits and utilities within town limits, and the county still keeps the parcel and deed records. Acreage past the city limits near Saukville generally falls under county rules instead.
Searching the map
By address works best for lots in Port Washington; for owner searches, try last name first. If the land is near Grafton, searching by parcel number never misses, and it carries over to every office in the county.
Layers worth turning on
Closer to Fredonia, look in the layer list for city limits, flood hazard, zoning or soils; availability varies.
Taking the map into the field
Most viewers work in a phone browser, which helps when you're standing on land near Belgium, so load it before you lose signal. A saved image of the lot near Newburg and its lines helps when you meet an owner or agent.
Saving what you find
Print or screenshot the parcel near Belgium with its ID visible, which helps later when you ask the assessor or a title company.
Ozaukee County in a few facts
Port Washington holds the county offices, which is where the courthouse records live. You'll also find Saukville, Grafton, Fredonia, and Cedarburg, each with its own cluster of lots. Roughly 93,460 people live in Ozaukee County (Census Bureau estimate, 2023) spread over some 233 square miles. Ozaukee County was formed in 1853, and some chains of title near Grafton are long. Places such as Lake Michigan and Lion's Den Gorge Nature Preserve make handy reference points on the map near Cedarburg.
Reading a parcel record
Recent sales on nearby lots around Belgium are a useful starting point; an appraiser is the real authority.
When the map won't load
If the viewer stalls on a phone near Newburg, try a desktop browser or clear the cache; the Platbookmapper county page tracks the current link.
Reading the legal description
Wisconsin uses the Public Land Survey System, so rural legal descriptions near Cedarburg cite section, township and range. A standard section is about one square mile, roughly 640 acres, and a township holds 36 of them, though real sections near Belgium vary in size. Write down the legal description for the tract near Saukville before you request a deed or survey.
Neighboring parcel maps
Ozaukee County borders Muskegon County, MI, Oceana County, MI, Milwaukee County, Sheboygan County, and Washington County, all with their own assessor records. Ground near Newburg that runs to the line may be split in two county records, so check the adjacent map too. Around Belgium, our state page lists each bordering county map for Wisconsin.
Offices that can help
If the acreage or value on a parcel near Cedarburg looks off go to the county real property listing office, since that office keeps the assessment data. Building or septic questions for a lot near Fredonia need the planning or permitting office, depending on whether the land is inside town limits.
Questions about the Port Washington GIS map
Can I look up a property owner on the map near Newburg?
Good question; click the lot near Fredonia to see the owner, or search by address instead.
Why does a recent sale near Saukville not show?
Updates come in batches.
How accurate is the parcel map near Belgium?
In most cases, lines near Belgium can be off by several feet or more, so a licensed surveyor should mark corners.
Is the Port Washington GIS map free?
The county viewer covering Port Washington needs no account, though printing may be limited.
Is the parcel map a survey for land near Saukville?
No; boundary questions near Cedarburg need a licensed surveyor.
Open the official Ozaukee County, WI parcel map See it in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.