Wibaux County, MT: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Wibaux County scores at the 3.7th 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. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Mandatory flood insurance compliance in Wibaux County
FEMA hasn't published a residential structure count for Wibaux 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, 0.4% of all residential structures in Wibaux County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Wibaux County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Wibaux County ranks 3034 — 1 being the highest hazard nationally — and 3111 by population among all 3144 counties covered here, where 1 is the largest. Wibaux County, Montana is home to about 911 people across 889.571 square miles of land.
What to do next if you own or are buying in Wibaux County
Across all of Wibaux County's 1,006 residential structures, 4 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Wibaux County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Wibaux 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.