How much flood risk does Henry County actually carry?
Henry County lands at the 61.1th percentile of FEMA's National Risk Index for flooding, "Relatively Low" territory — below the national norm for flood hazard — with the hazard driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 5.1 times a year. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Mandatory flood insurance compliance in Henry County
Out of 119 homes FEMA counts inside Henry County's mapped flood zone, 11 carry the flood policy federal law requires there — 9.2% compliance, short of full coverage. Across all residential structures in Henry 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.
Where Henry County ranks
Henry County sits at rank 1279 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1695 of 3144 by population (1 is biggest). About 22,575 people live in Henry County, Missouri, spread over 696.936 square miles.
Your street may differ from Henry County's average
Across all of Henry County's 11,746 residential structures, 17 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
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.