Is Dyer County, TN in a flood zone?
FEMA's National Risk Index puts Dyer County's flood hazard at the 37.8th percentile nationally — below the national norm for flood 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. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Dyer County's flood-insurance compliance gap
Out of 762 homes FEMA counts inside Dyer County's mapped flood zone, 141 carry the flood policy federal law requires there — 18.5% compliance, short of full coverage. Across all residential structures in Dyer County, not just the ones FEMA mandates, 1.2% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Dyer County ranks
Dyer County sits at rank 2020 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1285 of 3144 by population (1 is biggest). About 36,403 people live in Dyer County, Tennessee, spread over 512.351 square miles.
What to do next if you own or are buying in Dyer County
179 of Dyer County's 15,283 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 Dyer 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.