Natrona County, WY flood risk explained
Flood hazard in Natrona County sits at the 74.7th national percentile, a middling flood hazard by national standards; driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about once every 1 years. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Natrona County's flood-insurance compliance gap
19% of the homes FEMA requires to carry flood insurance in Natrona County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 133 policies against 702 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Looking beyond the mandated zone, 0.5% of all residential structures in Natrona County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Natrona County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Natrona County ranks 831 — 1 being the highest hazard nationally — and 727 by population among all 3144 counties covered here, where 1 is the largest. Natrona County, Wyoming is home to about 80,410 people across 5,340.537 square miles of land.
Checking a specific address in Natrona County
FEMA counts 31,996 residential structures in Natrona County overall, 161 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
Where Natrona 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.