Blog · October 14, 2026 · Nebraska
Garden County Flood Zone Map, Nebraska: a practical guide
Flood zones are set by FEMA, and checking one near Crescent Lake National Wildlife Refuge takes a few minutes.
Main page: Garden County, NE GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Weighing a property around Oshkosh? Checking the Garden County flood zone map reveals whether it sits in a FEMA flood zone, and it costs nothing to check. What this Garden County guide covers: locating a parcel on FEMA's map, reading the zone codes, and pairing it with the Garden County gWorks map.
Checking the Garden County flood zone map step by step
For parcel-by-parcel detail, try the National Flood Hazard Layer viewer, which draws the zones over aerial imagery, and that holds around Crescent Lake National Wildlife Refuge too. A tract near Crescent Lake National Wildlife Refuge without an address is still easy to locate: pan from the closest town and click the spot.
The free map to start with
Go first to the Garden County gWorks map; it covers every assessed parcel in the county, North Platte River included. Without an address in hand, follow the nearest road on the aerial and click the parcel itself, for land near North Platte River included. With a lot near Lewellen, save the parcel ID from that panel; every clerk in the county will want it.
What the zone letters mean
In and around Lewellen, zones beginning with A or V are Special Flood Hazard Areas, meaning a 1% or greater chance of flooding each year. If you're looking near Mumper, a shaded X area is moderate risk, between the 1% and 0.2% annual chance floods; plain X, or C on older maps, means minimal mapped risk.
Parcel lines plus flood zones
FEMA doesn't draw property lines, so open the Garden County gWorks map next to see exactly which lot near Crescent Lake National Wildlife Refuge you're looking at.
Backing up the map with records
Out toward North Platte River, the map is an index, not the title: recorded deeds, subdivision plats and easements for parcels in the county are filed with the Register of Deeds. Older tracts near North Platte River can sit on many deeds, and a title company is worth hiring before a purchase.
Neighboring parcel maps
The county borders Arthur County, Cheyenne County, Deuel County, Grant County, and Keith County, all with their own assessor records, especially near Crescent Lake National Wildlife Refuge. A tract near the line by Crescent Lake National Wildlife Refuge may show up in two county records, so open the adjacent map before you assume the acreage. For land near Oshkosh, our state page lists each bordering county map across Nebraska.
What a flood zone means for a buyer
For a structure inside an A or V zone and the loan is federally backed or regulated, flood insurance is generally required in communities in the NFIP, and that holds around Mumper too. Remodeling a house in a zone near Oshkosh often needs a floodplain permit; ask the local floodplain administrator early.
Garden County in a few facts
Oshkosh serves as the county seat, which is where the courthouse records live. Smaller places on the map include Lewellen, Lisco, Mumper, and Rackett, where town lots give way to larger tracts. Around 1,794 people call Garden County home (Census estimate, 2023) across about 1,705 square miles. The county was organized in 1909, which matters when you trace an old farm's title around Rackett. Landmarks such as North Platte River and Crescent Lake National Wildlife Refuge help you orient on the aerial.
Field tips
Most viewers work in a phone browser, useful out on a road near North Platte River, though signal can drop in rural spots. A printout of the tract near Mumper keeps working without signal.
Low spots and local drainage
Low-lying fields near Oshkosh aren't always studied in detail, so ask neighbors about past flooding. Marshy spots near Rackett can limit building too; the National Wetlands Inventory mapper shows mapped wetlands.
A short flood checklist
For property near Lisco, ask the listing agent whether the home has flooded before closing; an insurance quote early avoids surprises.
Getting answers from the right desk
If the acreage or value on a parcel near Lisco looks off are handled by the County Assessor, the office behind the parcel record. Building or septic questions for a lot near Lewellen are for the local planning and health departments, depending on whether the land is inside town limits.
Legal descriptions in Nebraska
Nebraska is laid out under the Public Land Survey System, so deeds around North Platte River reference sections and townships. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though real sections near Crescent Lake National Wildlife Refuge vary in size. Write down the legal description for the tract near Lewellen for any title or survey request.
Quick answers
What is a LOMA around Rackett?
In most cases, FEMA's LOMA process is the usual route when a building near North Platte River sits above the base flood elevation; a surveyor's elevation data supports it.
Is my property near Mumper in a flood zone?
Short answer: look up the spot near Lisco in FEMA's National Flood Hazard Layer viewer; no account is needed.
What does an AE label mean for a lot near North Platte River?
In most cases, AE is a Special Flood Hazard Area with a published base flood elevation, so builders near Oshkosh design to that elevation.
Do I need to worry about flooding in Zone X near Crescent Lake National Wildlife Refuge?
For acreage around North Platte River, shaded X is moderate risk and unshaded X is minimal risk; FEMA notes that a large share of claims come from these areas.
What's a legal description around Rackett?
Out toward Mumper, Deeds use lot and block, metes and bounds or survey descriptions; copy it for any survey or title request.
Open the official Garden County, NE 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.