Sevier County, UT flood risk explained
Flood hazard in Sevier County sits at the 22.1th national percentile, among the lowest flood hazard in the country; 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. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Sevier County's flood-insurance compliance gap
Homes with a federally backed mortgage inside Sevier County's mapped high-risk flood zone (the Special Flood Hazard Area, or SFHA) are legally required to carry an NFIP flood policy. In practice, 23% of them do — 63 active policies against 274 structures FEMA counts in that zone, leaving a real compliance gap. Looking beyond the mandated zone, 1% of all residential structures in Sevier County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Sevier County compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Sevier County ranks 2490 — 1 being the highest hazard nationally — and 1698 by population among all 3144 counties covered here, where 1 is the largest. Sevier County, Utah is home to about 22,520 people across 1,910.476 square miles of land.
Your street may differ from Sevier County's average
Across all of Sevier County's 7,944 residential structures, 76 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Sevier 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.