Blog · October 14, 2026 · Wisconsin
Sturgeon Bay Flood Zone Map, Wisconsin: a practical guide
Flood zones are set by FEMA, and checking one near Sister Bay takes a few minutes.
Main page: Door County, WI GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before you buy or build near Egg Harbor, look at the Sturgeon Bay flood zone map: the zone on that map shapes insurance, permits and resale. In this Sturgeon Bay guide: locating a parcel on FEMA's map, decoding A, AE and X, and pairing it with the Door County parcel viewer.
Checking the Sturgeon Bay flood zone map step by step
The official source is FEMA's Flood Map Service Center: search an address around Sister Bay, then open the map view for that panel. Rural land near Ephraim with no street number can still be found: search the nearest road then click the parcel area.
Getting to the right map
The official parcel map for this area is the Door County parcel viewer, and no login is needed to use it. Out toward Sister Bay, put in a street address, an owner's name or a parcel number, and the matching parcel lights up. On ground around Sister Bay, the parcel card typically gives the owner of record, assessed acreage, the parcel number and often a sale date.
Land on the county line
Door County borders Benzie County, MI, Delta County, MI, Leelanau County, MI, Menominee County, MI, and Brown County, and each of those keeps its own parcel map. Acreage along the edge near Brussels can be split across two assessors' files, so open the neighboring map too. With a lot near Egg Harbor, our state page lists each bordering county map for Wisconsin.
A quick look at the area
Sturgeon Bay is the county seat, home to the main records offices. You'll also find Forestville, Egg Harbor, Ephraim, and Sister Bay, where town lots give way to larger tracts. About 30,562 people call Door County home (Census estimate, 2023) across some 482 square miles. Door County was organized in 1851, which matters when you trace an old farm's title. Features like Sturgeon Bay Shipping Canal, Mackaysee Lake, and Newport State Park help you orient on the aerial around Baileys Harbor.
Where Sturgeon Bay fits in
Sturgeon Bay sits in Door County, Wisconsin, so its parcels are on the county's map. Sturgeon Bay is also the county seat, handy when you need recorded documents. For property near Egg Harbor, city or town hall handles matters such as zoning, permits and utilities within town limits, while the county keeps the tax map. Lots just outside the town limits out by Baileys Harbor generally falls under county rules rather than the town's.
Water near Forestville
Small streams around Sister Bay aren't always studied in detail, so look for water marks and debris lines. Marshy spots near Brussels can limit building too; the National Wetlands Inventory mapper shows mapped wetlands.
Reading A, AE and X
In and around Ephraim, any A or V zone are Special Flood Hazard Areas, land with a 1-percent chance of flooding in any year. Closer to Brussels, shaded Zone X marks moderate flood hazard, between the 1% and 0.2% annual chance floods; unshaded X means minimal mapped risk.
What to request from a seller
Ask the listing agent about past flood claims on the property near Forestville; an insurance quote early avoids surprises.
Before you lean on the lines
The acreage figure is an assessed number; just a licensed surveyor sets the real lines on land around Forestville. Around Egg Harbor, owner names and values update on a schedule, so a deed recorded last month might lag behind.
Which office to call
If the acreage or value on a parcel near Ephraim looks off go to the county real property listing office, since that office keeps the assessment data. Zoning, permits and septic questions near Brussels are for the local planning and health departments, town or county, depending on location.
Field tips
Most viewers work in a phone browser, which helps when you're standing on land near Forestville, but coverage can be spotty out of town. A printout of the tract near Sister Bay keeps working without signal.
Lining it up with the parcel map
If only part of a parcel near Ephraim is shaded, the structure's footprint is the key question.
Insurance, lenders and building
Closer to Egg Harbor, ask for an Elevation Certificate: it records the building's elevation against the base flood. New construction in a floodplain near Egg Harbor can trigger elevation rules; call the permitting office before you plan.
Questions about the Sturgeon Bay flood zone map
What if the flood map is wrong for my lot near Egg Harbor?
In most cases, you can ask FEMA for a LOMA if surveyed elevations show the building near Brussels is above the BFE; it starts with an elevation survey.
When is flood insurance required around Egg Harbor?
Good question; for a building near Sister Bay in an A or V zone with a federally backed or regulated mortgage, it's generally required, in communities that take part in the NFIP.
Is AE a high-risk flood zone around Baileys Harbor?
For most people, AE is a Special Flood Hazard Area with a published base flood elevation, so builders near Egg Harbor design to that elevation.
How can I tell if a house near Forestville is in a flood zone?
For most people, look up the spot near Egg Harbor in FEMA's National Flood Hazard Layer viewer, which takes a couple of minutes.
Can I use the viewer in the field near Egg Harbor?
Most viewers run in a mobile browser; load it before you lose coverage near Brussels.
Open the official Door 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.