How much flood risk does Sevier County actually carry?
Sevier County lands at the 84.1th percentile of FEMA's National Risk Index for flooding, "Relatively Moderate" territory — a middling flood hazard by national standards — with the hazard driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 1.5 times a year. 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
Out of 1,600 homes FEMA counts inside Sevier County's mapped flood zone, 343 carry the flood policy federal law requires there — 21.4% compliance, short of full coverage. Across all residential structures in Sevier County, not just the ones FEMA mandates, 0.9% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
How Sevier County compares nationally
Sevier County sits at rank 524 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 621 of 3144 by population (1 is biggest). About 100,184 people live in Sevier County, Tennessee, spread over 592.518 square miles.
Your street may differ from Sevier County's average
426 of Sevier County's 46,628 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Sevier County's numbers. The guide to what the Special Flood Hazard Area actually means explains why the mandatory-insurance rule exists and who it applies to.