Humboldt County, IA: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Humboldt County scores at the 18.9th percentile for flood hazard, rated "Very Low" — among the lowest flood hazard in the country. The hazard here is driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 2.8 times a year. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Humboldt County's flood-insurance compliance gap
6.2% of the homes FEMA requires to carry flood insurance in Humboldt County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 11 policies against 178 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Looking beyond the mandated zone, 0.3% of all residential structures in Humboldt County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Humboldt County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Humboldt County ranks 2590 — 1 being the highest hazard nationally — and 2439 by population among all 3144 counties covered here, where 1 is the largest. About 9,617 people live in Humboldt County, Iowa, spread over 434.372 square miles.
What to do next if you own or are buying in Humboldt County
Across all of Humboldt County's 4,920 residential structures, 15 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Humboldt County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. If you're unsure why any of this insurance requirement exists at all, the SFHA explainer covers it from first principles.