Dunn County, WI flood risk explained
Flood hazard in Dunn County sits at the 50.2th 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. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Dunn County's flood-insurance compliance gap
19% of the homes FEMA requires to carry flood insurance in Dunn County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 44 policies against 232 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 Dunn County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Dunn County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Dunn County ranks 1627 — 1 being the highest hazard nationally — and 1066 by population among all 3144 counties covered here, where 1 is the largest. Dunn County, Wisconsin covers 850.16 square miles and counts roughly 46,135 residents.
Your street may differ from Dunn County's average
50 of Dunn County's 14,553 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Dunn 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.