Boundary County, ID flood risk explained
Flood hazard in Boundary County sits at the 45.8th national percentile, below the national norm for flood hazard; 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. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Mandatory flood insurance compliance in Boundary County
FEMA hasn't published a residential structure count for Boundary 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 Boundary County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Boundary County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Boundary County ranks 1765 — 1 being the highest hazard nationally — and 2161 by population among all 3144 counties covered here, where 1 is the largest. Boundary County, Idaho covers 1,268.679 square miles and counts roughly 14,040 residents.
What to do next if you own or are buying in Boundary County
10 of Boundary County's 6,019 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Boundary County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Boundary 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.