Bonneville County, ID flood risk explained
Flood hazard in Bonneville County sits at the 78.6th national percentile, a middling flood hazard by national standards; driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about once every 2 years. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Who actually carries the flood insurance FEMA requires
FEMA hasn't published a residential structure count for Bonneville 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, 0.2% of all residential structures in Bonneville County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Bonneville County compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Bonneville County ranks 702 — 1 being the highest hazard nationally — and 493 by population among all 3144 counties covered here, where 1 is the largest. About 133,644 people live in Bonneville County, Idaho, spread over 1,865.96 square miles.
Your street may differ from Bonneville County's average
70 of Bonneville County's 40,097 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Bonneville County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Bonneville 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.