How much flood risk does Duchesne County actually carry?
Duchesne County lands at the 15.3th percentile of FEMA's National Risk Index for flooding, "Very Low" territory — among the lowest flood hazard in the country — with the hazard 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. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Duchesne County's flood-insurance compliance gap
Duchesne County is one of the counties where FEMA's own denominator for mandated flood-zone structures is missing, so no compliance rate is shown rather than a guessed one — the data quality guide covers how common this is. Across all residential structures in Duchesne County, not just the ones FEMA mandates, 0.1% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
How Duchesne County compares nationally
Duchesne County sits at rank 2693 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1779 of 3144 by population (1 is biggest). About 20,803 people live in Duchesne County, Utah, spread over 3,235.523 square miles.
Your street may differ from Duchesne County's average
FEMA counts 9,064 residential structures in Duchesne County overall, 6 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Duchesne County's numbers. See the data quality guide for why Duchesne County, like hundreds of other counties, doesn't get a clean compliance percentage.