Blog · October 14, 2026 · Kansas
Washington County Flood Zone Map, Kansas: a practical guide
Flood zones are set by FEMA, and checking one near Hollenberg takes a few minutes.
Main page: Washington County, KS GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Weighing a property around Greenleaf? A quick look at the Washington County flood zone map shows whether it sits in a FEMA flood zone, and it costs nothing to check. Covered here for Washington County: locating a parcel on FEMA's map, decoding A, AE and X, and matching it with the county parcel viewer.
The Washington County flood zone map: start here
For a more interactive look, open the National Flood Hazard Layer viewer, which draws the zones over aerial imagery, whether the land is near Hollenberg or elsewhere in the county. A tract near Haddam without an address is still easy to locate: pan from the closest town and click the spot.
Opening the official parcel viewer
Property in and around Greenleaf are published on the ORKA parcel viewer, free to use and open without a login. On ground around Hollenberg, type a street address, an owner's name or a parcel number, and the matching parcel lights up. If you're looking near Barnes, write down the parcel ID while you have it open; every office in the county asks for it first.
Beyond the mapped zones
Creeks and ditches near Hanover may not have detailed mapping, so walk the land after rain. Marshy spots near Haddam can limit building too; check the National Wetlands Inventory mapper for a first look.
When a parcel crosses a boundary
Washington County touches Clay County, Cloud County, Marshall County, Republic County, and Riley County, and each of those keeps its own parcel map. A tract near the line by Hanover may show up across two assessors' files, so look at the adjacent map before you assume the acreage. For a tract near Greenleaf, the Platbookmapper state page links every bordering county map across Kansas.
Zones on the Washington County flood zone map
For a home near Haddam, A and V zones mark the Special Flood Hazard Area, meaning a 1% or greater chance of flooding each year. If you're looking near Clifton, shaded Zone X is moderate risk, between the 1% and 0.2% annual chance floods; unshaded X means minimal mapped risk.
What the map can't tell you
The acreage figure is a tax-roll number; just a licensed surveyor sets the real corners on land around Barnes. Out toward Greenleaf, records update in batches, so a deed recorded last month may not show yet.
Recorded documents worth pulling
Out toward Barnes, the map is an index, not the title: deeds, plats and easements for parcels in the county are filed with the Register of Deeds. If the land is near Barnes, use the instrument number listed on the parcel record to skip a name search.
Which office to call
Recorded documents for a parcel near Barnes sit in the index kept by the Register of Deeds, often with an online index. Questions about what you can build around Lanham are for the local planning and health departments, depending on whether the land is inside town limits.
Lining it up with the parcel map
FEMA's map shows zones but not ownership, so pair it with the ORKA parcel viewer to see exactly which lot near Lanham you're looking at.
Legal descriptions in Kansas
Kansas is laid out under the Public Land Survey System, so deeds around Hanover reference sections and townships. Each section is nominally a mile square, about 640 acres, with 36 sections to a township, though sections near Greenleaf can be irregular. Copy the legal description from the record for the parcel near Greenleaf before you request a deed or survey.
On site with the map
The parcel map usually runs in a mobile browser, which helps when you're standing on land near Haddam, so load it before you lose signal. A saved image of the lot near Hanover and its lines helps when you meet an owner or agent.
What a flood zone means for a buyer
On ground around Haddam, an Elevation Certificate from a surveyor helps: it compares the building to the BFE. Building or adding on near Hollenberg in a mapped zone can trigger elevation rules; ask the local floodplain administrator early.
Questions to ask before you buy
Ask the seller about past flood claims on the property near Hanover; an insurance quote early keeps the budget honest.
Questions about the Washington County flood zone map
How can I tell if a house near Greenleaf is in a flood zone?
Good question; look up the spot near Barnes in FEMA's National Flood Hazard Layer viewer, and the zone code appears on the map.
How often are flood maps updated for land near Clifton?
For most people, zones near Clifton can shift when FEMA updates a panel; check the effective date on the panel.
What is a LOMA in Washington County?
For a tract near Clifton, a Letter of Map Amendment (LOMA) from FEMA can remove a structure on naturally high ground; a surveyor's elevation data supports it.
What does Zone AE mean near Lanham?
In and around Haddam, an AE zone has a 1% annual chance of flooding and a base flood elevation; unnumbered A zones don't list one.
What is a parcel ID near Barnes?
It's the number the County Appraiser uses to track a tract near Hollenberg; copy it before you call anyone.
Open the official Washington 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.