Trousdale County, TN flood risk explained
Flood hazard in Trousdale County sits at the 13.4th 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. 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 Trousdale County
Out of 99 homes FEMA counts inside Trousdale County's mapped flood zone, 8 carry the flood policy federal law requires there — 8.1% compliance, short of full coverage. Looking beyond the mandated zone, 0.3% of all residential structures in Trousdale County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Trousdale County ranks
Among the 3144 US counties FEMA scores for flood hazard, Trousdale County ranks 2750 — 1 being the highest hazard nationally — and 2272 by population among all 3144 counties covered here, where 1 is the largest. About 12,159 people live in Trousdale County, Tennessee, spread over 114.342 square miles.
Checking a specific address in Trousdale County
Across all of Trousdale County's 3,851 residential structures, 13 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Trousdale 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.