Is Henry County, IA in a flood zone?
FEMA's National Risk Index puts Henry County's flood hazard at the 26.7th 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.
Mandatory flood insurance compliance in Henry County
Henry County is one of the counties where FEMA's own denominator for mandated flood-zone structures is missing, so no compliance rate is shown rather than a guessed one — the data quality guide covers how common this is. Across all residential structures in Henry County, not just the ones FEMA mandates, 0% 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 2353 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1867 of 3144 by population (1 is biggest). About 19,361 people live in Henry County, Iowa, spread over 434.288 square miles.
Your street may differ from Henry County's average
FEMA counts 8,670 residential structures in Henry County overall, 0 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. See the data quality guide for why Henry County, like hundreds of other counties, doesn't get a clean compliance percentage.