Blog · October 14, 2026 · Kansas
De Soto Flood Zone Map, Kansas: a practical guide
Flood zones are set by FEMA, and checking one near Tonganoxie takes a few minutes.
Main page: Leavenworth County, KS GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Ahead of any purchase around Easton, pull up the De Soto flood zone map: the zone on that map shapes insurance, building rules and resale. Covered here for De Soto: the free FEMA tools, what each zone label means, lender insurance rules and how to challenge a map that looks wrong.
Where the De Soto flood zone map lives
Start with FEMA's Flood Map Service Center: search an address around Tonganoxie, and choose the dynamic map. A tract near Lansing without an address can still be found: zoom in from the nearest road then click the parcel area.
The free map to start with
Parcels around Easton appear on the ORKA parcel viewer, which opens without registering. For a home near Basehor, type a street address, an owner's name or a parcel number, then pick the result to center the map on it. If you're looking near Lansing, write down the parcel ID before closing the panel; every clerk in the county uses it to find the file.
Field tips
The parcel map usually runs in a mobile browser, useful out on a road near Tonganoxie, though signal can drop in rural spots. A printout of the tract near Basehor keeps working without signal.
Questions to ask before you buy
Ask the seller for any Elevation Certificate for the house near Linwood; getting a quote early keeps the budget honest.
City limits and county records
De Soto sits in Leavenworth County, Kansas, so its parcels are on the county's map. In and around Tonganoxie, the municipality handles matters such as zoning, permits and utilities for lots inside the boundary, but the county runs assessment and recording. Lots just outside the city limits toward Easton generally answers to county rules rather than the town's.
Leavenworth County in a few facts
Leavenworth is the county seat, home to the main records offices. You'll also find Linwood, Bonner Springs, Basehor, and Tonganoxie, where town lots give way to larger tracts. About 83,518 people live in Leavenworth County (Census estimate, 2023) spread over some 463 square miles. Leavenworth County dates to 1855, so old deeds can run back a long way.
Water near Linwood
Creeks and ditches near Basehor aren't always studied in detail, so look for water marks and debris lines. Marshy spots near Bonner Springs can limit building too; the National Wetlands Inventory mapper shows mapped wetlands.
What the zone letters mean
If you're looking near Bonner Springs, zones beginning with A or V mark the Special Flood Hazard Area, meaning a 1% or greater chance of flooding each year. For a home near Lansing, a shaded X area marks moderate flood hazard, roughly the 100- to 500-year range; unshaded X means minimal mapped risk.
Next door to Leavenworth County
Leavenworth County borders Atchison County, Douglas County, Jefferson County, Johnson County, and Wyandotte County; every one of them runs a separate parcel map. Acreage along the edge near Tonganoxie may be split across two assessors' files, so look at the adjacent map as well. For land near Tonganoxie, our state page lists every neighboring county map across Kansas.
Recorded documents worth pulling
On ground around Bonner Springs, the map is an index, not the title: deeds, plats and easements for parcels in the county sit with the Register of Deeds. Inherited tracts around Easton may trace back through several deeds, so a title company is worth hiring on a real sale.
Who handles what
For assessment questions about property around Tonganoxie belong with the County Appraiser, the office behind the parcel record. Building or septic questions for a lot near Basehor go to planning, building or health offices, town or county, depending on location.
Lining it up with the parcel map
FEMA doesn't draw property lines, so check the ORKA parcel viewer too to see exactly which lot near Bonner Springs you're looking at.
Money questions tied to the zone
For land near Linwood, get the Elevation Certificate if one exists: it compares the building to the BFE. Building or adding on near Easton in a mapped zone often needs a floodplain permit; call the permitting office before you plan.
Sections, lots and bearings
Kansas follows the Public Land Survey System, so deeds around Lansing reference sections and townships. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though corrections make some sections near Basehor odd-sized. Write down the legal description for the tract near Basehor for any title or survey request.
De Soto: common questions
Can a property in Zone X near Bonner Springs flood?
Usually, Zone X near Basehor means moderate (shaded) or minimal (unshaded) mapped risk; many owners near Easton buy coverage anyway.
When is flood insurance required near Easton?
Good question; lenders generally require it for buildings near Easton in a Special Flood Hazard Area when the loan is federally regulated or insured; elsewhere it's optional.
How do I check the flood zone for an address in De Soto?
In most cases, look up the spot near Basehor in FEMA's National Flood Hazard Layer viewer, which takes a couple of minutes.
Is AE a high-risk flood zone near Tonganoxie?
Good question; both are high-risk zones, but only AE has a base flood elevation, so builders near Easton design to that elevation.
Does the parcel map work on a phone near Bonner Springs?
In and around Linwood, most viewers run in a mobile browser; screenshots help offline.
Open the official Leavenworth County, KS 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.