Blog · October 14, 2026 · Wisconsin
Using the Elkhorn Plat Map
A recorded plat shows how land near Fontana-on-Geneva Lake was divided into lots.
Main page: Walworth County, WI GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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If a legal description for land in Elkhorn cites a lot number, you'll need the Elkhorn plat map to make sense of it. Covered here for Elkhorn: where plats are filed, how a plat differs from a parcel map, and the details that matter to buyers.
Getting started with the Elkhorn plat map
For a subdivision near Lake Geneva, the deed or parcel record often names the subdivision and plat reference; use it to request a copy.
Where the parcel data lives
Go first to the Walworth County parcel viewer; it covers every tax parcel from Fontana-on-Geneva Lake to Williams Bay. Without an address in hand, zoom in from Lake Geneva and select the outline. Around Lyons, the record panel usually lists the owner of record, acreage on the tax roll, a parcel ID and often a sale date.
Places you'll see on the map
Elkhorn serves as the county seat, where most land records are kept. Other places on the map include Delavan, Williams Bay, Lake Geneva, and Fontana-on-Geneva Lake. About 105,822 people live in Walworth County (Census estimate, 2023) spread over about 555 square miles. Walworth County was organized in 1839, so old deeds can run back a long way.
Elkhorn, WI: the basics
Elkhorn is part of Walworth County, Wisconsin, which means parcel data comes from the county. Elkhorn is also the county seat, handy when you need recorded documents. Around Fontana-on-Geneva Lake, city or town hall handles things like zoning, permits and utilities for lots inside the boundary, and the county still keeps the parcel and deed records. Land beyond the town limits out by Lyons often follows county rules rather than the town's.
Field tips
Most viewers work in a phone browser, which helps when you're standing on land near Walworth, but coverage can be spotty out of town. A screenshot of the parcel near Williams Bay with its ID helps when you meet an owner or agent.
How land is described here
Wisconsin is laid out under the Public Land Survey System, so rural legal descriptions near Williams Bay cite section, township and range. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though real sections near Fontana-on-Geneva Lake vary in size. Keep the legal description for land near Williams Bay before you request a deed or survey.
Two different maps
The Walworth County parcel viewer draws parcels for taxes, but the recorded plat is what the deed relies on.
Offices that can help
If the acreage or value on a parcel near Williams Bay looks off are handled by the county real property listing office, the office behind the parcel record. Questions about what you can build around Walworth are for the local planning and health departments, and the answer depends on jurisdiction.
What a plat shows
Around Williams Bay, the sheet usually includes lot and block numbers, dimensions and bearings, street rights-of-way and easements.
Ordering the Elkhorn plat map
For a parcel near Walworth, some counties put plat images online, while others require a visit or a request; copy fees are usually small.
When a parcel crosses a boundary
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. A tract near the line by Fontana-on-Geneva Lake can show up in two county records, so check the adjacent map too. For acreage around Delavan, the Platbookmapper state page lists each bordering county map for Wisconsin.
Amended plats
Lots near Delavan can be combined or reconfigured by a replat, search the index for replats of the same subdivision; vacated streets or alleys also get recorded.
Land outside a subdivision
Acreage around Lake Geneva outside a subdivision may have no plat at all; the deed and any recorded survey describe it instead.
A word on accuracy
Parcel lines are drawn for taxes, not measured on the ground, so a tree line near Walworth often sits some distance off the line on screen. For acreage around Fontana-on-Geneva Lake, owner names and values update on a schedule, so a deed recorded last month might lag behind.
The paper trail behind a parcel
The map is an index, not the title: recorded deeds, plats and easements covering ground around Fontana-on-Geneva Lake are filed with the Register of Deeds. Around Williams Bay, have ready the instrument number shown in the record panel and the lookup takes minutes.
Frequently asked
What do the dashed lines on a plat mean for land near Delavan?
For land near Walworth, dashed lines often mark easements or building lines, so check before you build.
How far back do plats go near Delavan?
For property near Lyons, it varies; some offices have scanned older plats and some haven't.
Where can I find the Elkhorn plat map?
It depends, but recorded plats near Lyons are filed with the Register of Deeds; small copy fees are common.
Can lots near Lyons be combined?
It depends, but lot splits in Elkhorn go through the planning office; ask staff about the process.
Where do I find the parcel number for land near Walworth?
It's the number the county real property listing office uses to track a tract near Delavan, and it's on the record panel and tax bills.
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.