How much flood risk does Iowa County actually carry?
Iowa County lands at the 31.7th percentile of FEMA's National Risk Index for flooding, "Very Low" territory — among the lowest flood hazard in the country — 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 1 years. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Who actually carries the flood insurance FEMA requires
Out of 81 homes FEMA counts inside Iowa County's mapped flood zone, 11 carry the flood policy federal law requires there — 13.6% compliance, short of full coverage. Across all residential structures in Iowa County, not just the ones FEMA mandates, 0.2% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Iowa County ranks
Iowa County sits at rank 2206 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1650 of 3144 by population (1 is biggest). Iowa County, Wisconsin is home to about 23,963 people across 762.698 square miles of land.
Checking a specific address in Iowa County
FEMA counts 8,778 residential structures in Iowa County overall, 19 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 Iowa 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.