Blog · October 14, 2026 · Nebraska
Johnson County Flood Zone Map, Nebraska: a practical guide
Flood zones are set by FEMA, and checking one near Saint Mary takes a few minutes.
Main page: Johnson County, NE GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before you buy or build near Tecumseh, look at the Johnson County flood zone map: the zone on that map shapes insurance, building rules and resale. In this Johnson County guide: finding the address on FEMA's map, decoding A, AE and X, and pairing it with the Johnson County gWorks map.
Checking the Johnson County flood zone map step by step
For a more interactive look, try the National Flood Hazard Layer viewer, which lets you click a spot and read its zone, for land near Crab Orchard included. Vacant ground around Saint Mary can still be found: search the nearest road then click the parcel area.
Where the parcel data lives
Lots and tracts near Sterling are published on the Johnson County gWorks map, which opens without registering. If you're looking near Elk Creek, enter a street address, an owner's name or a parcel number, and the matching parcel lights up. On ground around Crab Orchard, copy the parcel ID from that panel; every clerk in the county will want it.
When a parcel crosses a boundary
Johnson County meets Gage County, Lancaster County, Nemaha County, Otoe County, and Pawnee County; every one of them runs a separate parcel map. A tract near the line by Saint Mary may be split across two assessors' files, so open the neighboring map too. For a parcel near Crab Orchard, our state page links every bordering county map across Nebraska.
Offices that can help
Anything recorded against property around Sterling are with the Register of Deeds, sometimes only in person. Zoning, permits and septic questions near Crab Orchard go to planning, building or health offices, town or county, depending on location.
A quick look at the area
Tecumseh is the county seat, where most land records are kept. Smaller places on the map include Cook, Crab Orchard, Elk Creek, and Sterling, each with its own cluster of lots. Around 5,198 people call Johnson County home (Census estimate, 2023) on roughly 376 square miles. The county dates to 1855, and some chains of title near Vesta are long.
Decoding the flood zone labels
Zone AE carries a published BFE, and an unnumbered A zone has none; builders around Saint Mary design to it. For a parcel near Crab Orchard, shaded Zone X is moderate risk, roughly the 100- to 500-year range; unshaded X is minimal risk.
Matching the zone to the lot lines
FEMA doesn't draw property lines, so pair it with the Johnson County gWorks map to see exactly which lot near Crab Orchard you're looking at.
Lenders and permits
On ground around Cook, get the Elevation Certificate if one exists: it compares the building to the BFE. New construction in a floodplain near Crab Orchard can trigger elevation rules; check with the county or town building office early.
On site with the map
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Saint Mary, though signal can drop in rural spots. A screenshot of the parcel near Crab Orchard with its ID helps when you meet an owner or agent.
Sections, lots and bearings
Nebraska is laid out under the Public Land Survey System, so rural legal descriptions near Crab Orchard cite section, township and range. A standard section is about one square mile, roughly 640 acres, with 36 sections to a township, though sections near Elk Creek can be irregular. Copy the legal description from the record for the parcel near Saint Mary before you request a deed or survey.
What to request from a seller
Request about past flood claims on the property near Saint Mary; getting a quote early keeps the budget honest.
Beyond the mapped zones
Low-lying fields near Tecumseh may not have detailed mapping, so walk the land after rain. Marshy spots near Tecumseh can limit building too; check the National Wetlands Inventory mapper for a first look.
Limits of the parcel data
Tax maps are drawn for assessment, not measured on the ground, so a fence near Elk Creek often sits several feet off the line on screen. For a tract near Elk Creek, owner names and values update on a schedule, so a deed recorded last month can take weeks to appear.
Questions about the Johnson County flood zone map
What does Zone AE mean near Cook?
It depends, but both are high-risk zones, but only AE has a base flood elevation, so builders near Saint Mary design to that elevation.
How often are flood maps updated around Cook?
A new study can move a zone line near Cook, so look at the panel date.
When is flood insurance required for land near Sterling?
Short answer: lenders generally require it for buildings near Crab Orchard in a Special Flood Hazard Area when the loan is federally regulated or insured; outside those zones it's your call.
What is a LOMA for land near Tecumseh?
It depends, but you can ask FEMA for a LOMA if surveyed elevations show the building near Sterling is above the BFE; a surveyor's elevation data supports it.
Does the parcel map work on a phone for land near Crab Orchard?
For property near Crab Orchard, most viewers run in a mobile browser, though rural signal can drop.
Open the official Johnson 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.