Flood zone · Montana
Flood zone in Montana
Flood zone (FEMA NFHL) data for ZIP codes in Montana. Pick a ZIP below to dive into the flood zone summary.
Last verified 2026-09-24 · methodology
What lands here
Not on zipradar yet. The plan is the FEMA flood zone code, what it means in plain English, and the base flood elevation where assigned. Until then, look the address up on FEMA's Flood Map Service Center.
Source & refresh
FEMA NFHL. Refreshed quarterly loma updates. Primary source →
Montana top concern
Radon Zone 1, wildfire
Montana is uniformly Zone 1 radon. Wildfire risk concentrates in the western mountains; the 2017 + 2021 + 2024 seasons all set records. EPA SDWIS shows compliance disparity between Helena/Missoula/Billings and small rural systems.
See Montana state page for the full state-level rollup across all 12 dimensions.
Read more on flood zone
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FEMA flood zones — AE vs. X vs. VE in plain English
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