Blog · October 14, 2026 · Wisconsin
Brown County Flood Zone Map, Wisconsin: a practical guide
The zone on FEMA's map affects insurance, building and resale near Bellevue.
Main page: Brown County, WI GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Ahead of any purchase around Green Bay, check the Brown County flood zone map: the zone on that map shapes insurance, building rules and resale. This Brown County guide covers: locating a parcel on FEMA's map, decoding A, AE and X, and matching it with the county parcel viewer.
Getting started with the Brown County flood zone map
With a lot near Askeaton, flood zones come from FEMA's Flood Map Service Center: enter the street address, then open the map view for that panel. A tract near Bellevue without an address is still easy to locate: search the nearest road then click the parcel area.
Where the parcel data lives
Begin with the Brown County ArcGIS parcel map; it maps every assessed parcel from Benderville to Bellevue. If the land is near Green Bay, enter a street address, an owner's name or a parcel number, then pick the result to center the map on it. For a home near De Pere, save the parcel ID from that panel; each records desk in the county uses it to find the file.
Decoding the flood zone labels
An AE label comes with a base flood elevation, while plain Zone A does not; that elevation drives building rules near Denmark. On ground around Denmark, a shaded X area marks moderate flood hazard, roughly the 100- to 500-year range; unshaded X means minimal mapped risk.
Where the recorded documents are
For a parcel near Bay Settlement, the map is an index, not the title: deeds, subdivision plats and easements for parcels in the county sit with the Register of Deeds. Inherited tracts around Askeaton can trace back through many deeds, so a title company is worth hiring before a purchase.
Getting your bearings
Green Bay serves as the county seat, where most land records are kept. Smaller places on the map include De Pere, Allouez, Ashwaubenon, and Bellevue. Roughly 271,417 people call Brown County home (Census estimate, 2023) spread over roughly 530 square miles. Brown County was organized in 1818, which matters when you trace an old farm's title.
A short flood checklist
For land near Bay Settlement, request for any Elevation Certificate before closing; getting a quote early keeps the budget honest.
Use the county map alongside FEMA
FEMA doesn't draw property lines, so check the Brown County ArcGIS parcel map too for the outline of the tract near Allouez.
Reading the legal description
Wisconsin follows the Public Land Survey System, so deeds around Anston reference sections and townships. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though corrections make some sections near Greenleaf odd-sized. Write down the legal description for the tract near Anston when you talk to a surveyor.
Low spots and local drainage
Low-lying fields near Anston aren't always studied in detail, so look for water marks and debris lines. Wetlands near De Pere can limit building even outside a flood zone; the National Wetlands Inventory mapper shows mapped wetlands.
Insurance, lenders and building
On ground around Denmark, ask for an Elevation Certificate: it compares the building to the BFE. Remodeling a house in a zone near Green Bay often needs a floodplain permit; call the permitting office early.
Taking the map into the field
Most viewers work in a phone browser, handy when you're parked on a road near Askeaton, but coverage can be spotty out of town. A saved image of the lot near Denmark and its lines is a good backup.
Limits of the parcel data
Out toward Greenleaf, the acreage figure is an assessed number; only a licensed surveyor can set the real lines on the ground. For land near Anston, records update in batches, so a deed recorded last month may not show yet.
Land on the county line
Brown County meets Calumet County, Door County, Kewaunee County, Manitowoc County, and Oconto County, all with their own assessor records. Acreage along the edge near Dyckesville can show up across two assessors' files, so look at the adjacent map before you assume the acreage. For acreage around Allouez, the Platbookmapper state page lists every bordering county map for Wisconsin.
Frequently asked
Can a flood zone near Bay Settlement change?
If you're looking near Anston, FEMA revises flood maps panel by panel as new studies finish; check the effective date on the panel.
Why does the BFE matter near Ashwaubenon?
It depends, but the base flood elevation is the water level expected in the 1% annual chance flood; surveyors near Bay Settlement use it often.
Will my lender require flood insurance near De Pere?
For a building near Greenleaf in an A or V zone with a federally backed or regulated mortgage, it's generally required; outside those zones it's your call.
Do I need to worry about flooding in Zone X near Ashwaubenon?
If the land is near Allouez, shaded X is moderate risk and unshaded X is minimal risk, and floods still happen outside high-risk zones.
What's the tax parcel number used for near Dyckesville?
It's the number the county real property listing office uses to track a tract near Anston; copy it before you call anyone.
Open the official Brown 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.