Dunn County, ND: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Dunn County scores at the 10.1th 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 once every 2 years. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Dunn County's flood-insurance compliance gap
FEMA hasn't published a residential structure count for Dunn 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, 0.6% 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 2845 — 1 being the highest hazard nationally — and 2882 by population among all 3144 counties covered here, where 1 is the largest. Dunn County, North Dakota covers 2,008.492 square miles and counts roughly 4,031 residents.
Checking a specific address in Dunn County
FEMA counts 2,814 residential structures in Dunn 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 Dunn County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Dunn 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.