Is Chester County, TN in a flood zone?
FEMA's National Risk Index puts Chester County's flood hazard at the 21.8th percentile nationally — 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 1 years. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Who actually carries the flood insurance FEMA requires
Out of 9 homes FEMA counts inside Chester County's mapped flood zone, 2 carry the flood policy federal law requires there — 22.2% compliance, short of full coverage. Across all residential structures in Chester 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 Chester County compares nationally
Chester County sits at rank 2501 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1940 of 3144 by population (1 is biggest). Chester County, Tennessee covers 285.736 square miles and counts roughly 17,876 residents.
Checking a specific address in Chester County
7 of Chester County's 7,003 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 Chester 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.