Blog · October 14, 2026 · Idaho
Cassia County Flood Zone Map, Idaho: a practical guide
The zone on FEMA's map affects insurance, building and resale near Sawtooth National Forest.
Main page: Cassia County, ID GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before you buy or build near Milner Dam, check the Cassia County flood zone map: a mapped flood zone changes insurance, building rules and resale. Covered here for this county: finding the address on FEMA's map, decoding A, AE and X, and matching it with the county parcel viewer, at least around Milner Dam.
Checking the Cassia County flood zone map step by step
With a lot near Albion, flood zones come from FEMA's Flood Map Service Center: enter the street address, then open the map view for that panel. A tract near Milner Dam without an address can still be found: search the nearest road then click the parcel area.
The viewer Cassia County publishes
Begin with the Cassia County ArcGIS parcel map; it maps each assessed parcel from Declo to Idahome. For a parcel near Declo, enter a street address, an owner's name or a parcel number, then pick the result to center the map on it. For land near Milner Dam, write down the parcel ID before closing the panel; each office in the county uses it to find the file.
Getting answers from the right desk
Anything recorded against property around Malta come from the County Recorder (the county clerk serves as recorder), sometimes only in person. Building or septic questions for a lot near Milner Dam go to planning, building or health offices, town or county, depending on location.
Questions to ask before you buy
For a tract near Milner Dam, request for any Elevation Certificate before closing; getting a quote early keeps the budget honest.
Next door to this county for land near Milner Dam.
The county touches Blaine County, Jerome County, Minidoka County, Oneida County, and Power County; every one of them runs a separate parcel map, at least around Burley. Acreage along the edge near Oakley can be split across two assessors' files, so check the neighboring map before you assume the acreage. For a home near Almo, the Platbookmapper state page links each bordering county map for Idaho.
Before you lean on the lines
If you're looking near Albion, the acreage figure is an assessed number; only a licensed surveyor can set the real lines on the ground. On ground around Artesian City, records update in batches, so a deed recorded last month can take weeks to appear.
What the zone letters mean
For property near Jackson, any A or V zone mark the Special Flood Hazard Area, which FEMA defines as a 1% annual chance of flooding. Closer to Milner Dam, a low-risk label isn't a guarantee: FEMA notes that floods happen outside mapped zones too.
Use the county map alongside FEMA
FEMA doesn't draw property lines, so pair it with the Cassia County ArcGIS parcel map to see exactly which lot near Oakley you're looking at.
Low spots and local drainage
Creeks and ditches near Oakley aren't always studied in detail, so walk the land after rain. Wet ground around Idahome is a separate issue from flood zones; the National Wetlands Inventory mapper shows mapped wetlands.
Reading the legal description
Idaho is laid out under the Public Land Survey System, so rural legal descriptions near Minidoka National Wildlife Refuge cite section, township and range. Each section is nominally a mile square, about 640 acres, and a township holds 36 of them, though sections near Artesian City can be irregular. Copy the legal description from the record for the parcel near Artesian City when you talk to a surveyor.
On site with the map
Most viewers work in a phone browser, which helps when you're standing on land near Almo, though signal can drop in rural spots. A saved image of the lot near Idahome and its lines keeps working without signal.
What a flood zone means for a buyer
For a structure inside an A or V zone and a federally regulated lender is involved, flood insurance is generally required in communities in the NFIP, for land near Minidoka National Wildlife Refuge included. Building or adding on near Almo in a mapped zone usually means extra permit review; check with the county or town building office before you plan.
Getting your bearings
Burley is the county seat, which is where the courthouse records live. Smaller places on the map include Albion, Declo, Malta, and Oakley, where town lots give way to larger tracts. Roughly 25,696 people live in Cassia County (Census estimate, 2023) on about 2,566 square miles. The county was organized in 1879, and some chains of title near Oakley are long. Features like Snake River and Minidoka National Wildlife Refuge help you orient on the aerial.
Cassia County: common questions
How do I check the flood zone for an address in Cassia County?
Short answer: search the address near Milner Dam on FEMA's Flood Map Service Center; no account is needed.
What is a base flood elevation around Malta?
Usually, a BFE near Declo tells builders how high the lowest floor should be; surveyors near Idahome use it often.
What is a LOMA in Cassia County?
FEMA's LOMA process is the usual route when a building near Artesian City sits above the base flood elevation; a surveyor's elevation data supports it.
Do I need to worry about flooding in Zone X near Sawtooth National Forest?
Closer to Malta, shaded X is moderate risk and unshaded X is minimal risk; FEMA notes that a large share of claims come from these areas.
Can I use the viewer in the field near Snake River?
The map near Sawtooth National Forest usually works on a phone; screenshots help offline.
Open the official Cassia County, ID 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.