How much flood risk does Henry County actually carry?
Henry County lands at the 84.5th 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 once every 3 years. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Who actually carries the flood insurance FEMA requires
Out of 260 homes FEMA counts inside Henry County's mapped flood zone, 167 carry the flood policy federal law requires there — 64.2% compliance, short of full coverage. Across all residential structures in Henry County, not just the ones FEMA mandates, 0.4% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
How Henry County compares nationally
Henry County sits at rank 509 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 284 of 3144 by population (1 is biggest). About 259,315 people live in Henry County, Georgia, spread over 318.715 square miles.
Your street may differ from Henry County's average
FEMA counts 78,451 residential structures in Henry County overall, 338 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Henry 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.