Blog · October 14, 2026 · Idaho
Bannock County Flood Zone Map in Idaho
How to check whether a property in Bannock County sits in a FEMA flood zone, and what the answer means for a buyer near Chubbuck.
Main page: Bannock County, ID GIS & Parcel Viewer (official map link, Bannock County facts and neighboring maps).
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The Bannock County flood zone map question tends to arrive at a bad moment: a lender's letter, an insurance quote, or a permit counter in Arimo. You can check it yourself for any Arimo address in a few minutes.
We'll cover finding a Bannock County address on FEMA's map, what Zone A, AE and X mean, how the county viewer fits in, and what to do if the map looks wrong.
How to use the Bannock County flood zone map
Open the FEMA Flood Map Service Center and type a county street address, say one in McCammon. If a tract around Chubbuck has no street number yet, search the nearest road and pan to it. For an irregular lot near Chubbuck, FEMA's National Flood Hazard Layer viewer draws the zones over aerial imagery, so you can see whether the shading reaches a house near Chubbuck. Then open the Bannock County ArcGIS parcel map for Bannock County to confirm the parcel near McCammon. If the Bannock County viewer has a floodplain layer, treat it as a convenience copy and confirm on FEMA's map.
The county map you'll pair it with
For land around Chubbuck, open the Bannock County ArcGIS parcel map (an Esri ArcGIS web map); it's the map Bannock County itself publishes. Most people find their Bannock County tract fastest by searching an address in Chubbuck, then clicking the outline. If the official address for the Bannock County, ID map ever changes, our directory page carries the current link for McCammon and the rest of the county.
High, moderate and minimal risk in Bannock County
For a lot in McCammon, the label matters more than the color: A and V zones are Special Flood Hazard Areas, land with a 1-percent chance of flooding in any given year (the base or 100-year flood). Where a Bannock County tract displays Zone AE, there's a base flood elevation to compare a building against; in Zone A there is not one. Shaded Zone X around McCammon falls between the base flood and the 500-year flood. Unshaded Zone X near Chubbuck is minimal risk.
Where water shapes land in Bannock County
In Bannock County, look closest at tracts along Portneuf River and Snake River. Waterfront and bottomland parcels near McCammon often carry a zone along one edge, so check where the buildable part sits. A low spot on a Bannock County tract outside any mapped zone, which is why it's worth walking the ground after a heavy rain.
Questions to ask before buying in Bannock County
Request any past flood claims history for a Bannock County property before closing; it tells you more than the map alone. An agent working in Bannock County can quote flood coverage once you know the zone for the lot near Downey.
Floodways and restudies near Chubbuck
Zones on the map covering Chubbuck can change after a restudy, so the date on the county panel matters. Floodways, shown as hatched areas on some panels, are the channel and nearby land that must stay open, and building there near Arimo faces the strictest rules.
Flood insurance and building rules in Bannock County
The zone displays up again when a loan on a house near Chubbuck is underwritten. When a county home sits in a Special Flood Hazard Area and carries a federally backed mortgage, the lender must require flood coverage, provided the community near McCammon takes part in the National Flood Insurance Program. For a county home in shaded or unshaded X, federal rules don't require a policy; pricing a policy for land near Chubbuck is still worth a call. Think the map is wrong about a house in McCammon? The owner can ask FEMA for a Letter of Map Amendment (LOMA); a surveyor near Chubbuck can supply the elevation data. Placing fill on low ground near McCammon often requires a permit and an elevation check, so call the county or the town office in McCammon before work starts.
Bannock County, ID: common questions
Is there a floodplain layer in the Bannock County ArcGIS parcel map?
Look for a flood or floodplain layer in the Bannock County viewer, then verify the zone with FEMA.
What if FEMA's map is wrong about my house near McCammon?
FEMA reviews requests such as a LOMA for Bannock County properties; start with an elevation certificate.
What does Zone AE mean on a Bannock County flood map?
Zone AE on a lot in Downey is a mapped 100-year floodplain with a base flood elevation, so mandatory insurance rules apply to federally backed mortgages.
How can I check a Bannock County, ID flood zone?
Search the Downey address on FEMA's Flood Map Service Center; the effective panel displays the zone, and the county parcel map confirms the tract.
What does 100-year flood mean for Bannock County land?
No; land near McCammon in the 100-year floodplain carries a 1-in-100 chance in any single year, and two floods in one decade near Downey are possible.
Open the official Bannock County, ID parcel map Bannock County 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.