Blog · October 14, 2026 · Wisconsin
Using the Mukwonago Flood Zone Map
The zone on FEMA's map affects insurance, building and resale near Lake Geneva.
Main page: Walworth County, WI GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Weighing a property around Elkhorn? A quick look at the Mukwonago flood zone map shows whether FEMA puts it in a high-risk zone, and no account is needed. In this Mukwonago guide: the free FEMA tools, what each zone label means, when insurance is required and what a LOMA is.
Where the Mukwonago flood zone map lives
The official source is FEMA's Flood Map Service Center: search an address around East Troy, then open the map view for that panel. Rural land near East Troy with no street number can still be found: zoom in from Interstate 43 then click the parcel area.
The viewer Walworth County publishes
Begin with the Walworth County parcel viewer; it maps every assessed parcel in the county, Elkhorn included. If you only know roughly where the land is, follow Interstate 43 on the aerial and click the parcel itself. If you're looking near East Troy, a pop-up or side panel typically gives the owner of record, acreage on the tax roll, a parcel ID and in many cases the last transfer.
The paper trail behind a parcel
For anything that matters, request the recorded deed through the Register of Deeds; the parcel map near East Troy only summarizes it. Long-held tracts near Lake Geneva can trace back through a long string of deeds, and a title company is worth hiring if money is changing hands.
When a parcel crosses a boundary
Walworth County meets Boone County, IL, McHenry County, IL, Jefferson County, Kenosha County, and Racine County, and each of those keeps its own parcel map. Ground near Delavan that runs to the line may be split in two county records, so open the neighboring map as well. Out toward Lake Geneva, the Platbookmapper state page lists each neighboring county map across Wisconsin.
City limits and county records
Mukwonago lies within Walworth County, Wisconsin, so its parcels are on the county's map. On ground around Elkhorn, the municipality handles things like zoning, permits and utilities for lots inside the boundary, while the county keeps the tax map. Land beyond the city limits out by East Troy generally falls under county rules rather than the town's.
On site with the map
Most viewers work in a phone browser, which helps when you're standing on land near Lake Geneva, so load it before you lose signal. A printout of the tract near Elkhorn helps when you meet an owner or agent.
Decoding the flood zone labels
An AE label includes a base flood elevation (BFE), and an unnumbered A zone has none; builders around Delavan design to it. With a lot near Lake Geneva, minimal risk is not no risk: according to FEMA, many claims come from moderate- and low-risk areas.
Places you'll see on the map
Elkhorn serves as the county seat, which is where the courthouse records live. You'll also find East Troy, Lyons, and Lake Geneva, each with its own cluster of lots. Around 105,822 people call Walworth County home (Census Bureau estimate, 2023) spread over about 555 square miles. Walworth County dates to 1839, and some chains of title near Lake Geneva are long.
Sections, lots and bearings
Wisconsin is laid out under the Public Land Survey System, which means a tract near Lake Geneva is described by section, township and range. A standard section is about one square mile, roughly 640 acres, with 36 sections to a township, though real sections near East Troy vary in size. Keep the legal description for land near East Troy when you talk to a surveyor.
Parcel lines plus flood zones
FEMA's map shows zones but not ownership, so pair it with the Walworth County parcel viewer to confirm you have the right parcel near East Troy.
Insurance, lenders and building
If the land is near Burlington, get the Elevation Certificate if one exists: it records the building's elevation against the base flood. Remodeling a house in a zone near East Troy can trigger elevation rules; ask the local floodplain administrator early.
Beyond the mapped zones
Small streams around East Troy aren't always studied in detail, so walk the land after rain. Marshy spots near Burlington can limit building too; check the National Wetlands Inventory mapper for a first look.
A short flood checklist
Ask the seller whether the home has flooded on the property near Elkhorn; an insurance quote early avoids surprises.
Quick answers
Is AE a high-risk flood zone for land near East Troy?
It depends, but both are high-risk zones, but only AE has a base flood elevation, so builders near Lake Geneva design to that elevation.
Where can I see the Mukwonago flood zone map for free?
In most cases, search the address near Lake Geneva on FEMA's Flood Map Service Center; then confirm the parcel on the county viewer.
What is a base flood elevation near Elkhorn?
Usually, a BFE near Lyons tells builders how high the lowest floor should be; local rules may require building above it.
Does the county parcel map show flood zones in Mukwonago?
The parcel map near Delavan might show FEMA zones; confirm a lot near Elkhorn on FEMA's map either way.
Why don't the lines match my fence near Elkhorn?
The map near East Troy is approximate; a survey sets the real corners
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.