Henry County, IL: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Henry County scores at the 51.5th percentile for flood hazard, rated "Relatively Low" — below the national norm for flood hazard. The hazard here is driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 1.8 times a year. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Henry County's flood-insurance compliance gap
Out of 658 homes FEMA counts inside Henry County's mapped flood zone, 96 carry the flood policy federal law requires there — 14.6% compliance, short of full coverage. Looking beyond the mandated zone, 0.4% of all residential structures in Henry County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Henry County ranks
Among the 3144 US counties FEMA scores for flood hazard, Henry County ranks 1591 — 1 being the highest hazard nationally — and 1032 by population among all 3144 counties covered here, where 1 is the largest. About 48,177 people live in Henry County, Illinois, spread over 823.186 square miles.
Checking a specific address in Henry County
FEMA counts 25,706 residential structures in Henry County overall, 110 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
Where Henry 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.