Teton County, MT flood risk explained
Flood hazard in Teton County sits at the 32.2th national percentile, among the lowest flood hazard in the country; driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about once every 3 years. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Mandatory flood insurance compliance in Teton County
FEMA hasn't published a residential structure count for Teton County's mapped flood zone, so a reliable mandatory-compliance percentage can't be computed here — see the data quality guide for why this gap exists for roughly a quarter of US counties. Looking beyond the mandated zone, 0.4% of all residential structures in Teton County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Teton County compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Teton County ranks 2192 — 1 being the highest hazard nationally — and 2703 by population among all 3144 counties covered here, where 1 is the largest. Teton County, Montana is home to about 6,444 people across 2,271.616 square miles of land.
Your street may differ from Teton County's average
FEMA counts 5,049 residential structures in Teton County overall, 18 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
Where Teton County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Teton County's compliance figure is one of the ones affected by FEMA's incomplete denominator data — the data quality guide explains what that means and how many counties it touches.