Blog · October 14, 2026 · Wisconsin
Delavan GIS Map, Wisconsin: a how-to
Parcel data for Delavan comes from the county, and the viewer is free.
Main page: Walworth County, WI GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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When land near Fontana-on-Geneva Lake catches your eye, a look at the Delavan GIS map gives you the outline, the owner of record and a parcel ID. What this Delavan guide covers: where that map lives, how to search it, and what to double-check with records.
Finding a lot on the Delavan GIS map
Closer to Fontana-on-Geneva Lake, some cities also run their own GIS portal for utilities or zoning; that can add detail on top of the county map.
The viewer Walworth County publishes
Your first stop is the Walworth County parcel viewer; it includes each tax parcel from Elkhorn to Fontana-on-Geneva Lake. For land near Williams Bay, enter a street address, an owner's name or a parcel number, and the viewer zooms to the match. For acreage around Sharon, write down the parcel ID from that panel; each office in the county will want it.
A quick look at the area
Elkhorn is the county seat, where most land records are kept. Other places on the map include Darien, Williams Bay, and Fontana-on-Geneva Lake, each with its own cluster of lots. Around 105,822 people call Walworth County home (Census Bureau estimate, 2023) across about 555 square miles. Walworth County was organized in 1839, and some chains of title near Darien are long.
Delavan, WI: the basics
Delavan sits in Walworth County, Wisconsin, and the county assessor maps its lots. For acreage around Elkhorn, city or town hall handles things like zoning, permits and utilities within town limits, while the county keeps the tax map. Acreage past the city limits toward Sharon often answers to county rules rather than the town's.
Browser tips
When the map won't open around Elkhorn, try a desktop browser or clear the cache; links occasionally change, and our directory page keeps the current one.
Searching the map
Acreage around Elkhorn might not have a street number, so pan the aerial and click the lot. In and around Fontana-on-Geneva Lake, searching by parcel number never misses, and you'll find it on tax statements.
Beyond the parcel lines
For a parcel near Williams Bay, layer lists often include municipal boundaries, floodplain and sometimes zoning; availability varies.
Sections, lots and bearings
Wisconsin follows the Public Land Survey System, so deeds around Sharon reference sections and townships. A standard section is about one square mile, roughly 640 acres, with 36 sections to a township, though sections near Darien can be irregular. Write down the legal description for the tract near Williams Bay for any title or survey request.
Printing and saving
Print or screenshot the parcel near Elkhorn with its ID visible, which helps later when you ask the assessor or a title company.
Land on the county line
Walworth County touches Boone County, IL, McHenry County, IL, Jefferson County, Kenosha County, and Racine County; every one of them runs a separate parcel map. Ground near Fontana-on-Geneva Lake that runs to the line may show up across two assessors' files, so open the neighboring map too. For acreage around Darien, the Platbookmapper state page links each neighboring county map across Wisconsin.
Offices that can help
For assessment questions about property around Walworth belong with the county real property listing office, which maintains the tax roll. Questions about what you can build around Darien are for the local planning and health departments, and the answer depends on jurisdiction.
Where the recorded documents are
The map is an index, not the title: deeds, plats and easements covering ground around Williams Bay are filed with the Register of Deeds. In and around Walworth, have ready the document number shown in the record panel to skip a name search.
Reading a parcel record
Recent sales on nearby lots in Delavan are a useful starting point; they're not an appraisal.
Field tips
The parcel map usually runs in a mobile browser, which helps when you're standing on land near Williams Bay, but coverage can be spotty out of town. A saved image of the lot near Williams Bay and its lines helps when you meet an owner or agent.
What the map can't tell you
The acreage figure is an assessed number; just a licensed surveyor sets the real boundary on land around Fontana-on-Geneva Lake. For a home near Sharon, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Questions about the Delavan GIS map
Where else can I find maps of Delavan?
For most people, check the Delavan website or ask city hall; the county viewer remains the main parcel source.
How often is the parcel map updated for land near Elkhorn?
Usually, updates come in batches.
Is the Delavan GIS map free?
For most people, the Walworth County parcel viewer is free and opens without a login.
Can I search by owner name in Delavan?
In most cases, click the lot near Darien to see the owner; try variations if nothing comes up.
How do I save a parcel from the viewer around Williams Bay?
Use the print button or a screenshot; include the record panel for the lot near Walworth.
Open the official Walworth 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.