How much flood risk does Ozaukee County actually carry?
Ozaukee County lands at the 58.3th 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 1 times a year. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Ozaukee County's flood-insurance compliance gap
Out of 520 homes FEMA counts inside Ozaukee County's mapped flood zone, 232 carry the flood policy federal law requires there — 44.6% compliance, short of full coverage. Across all residential structures in Ozaukee County, not just the ones FEMA mandates, 1.5% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
How Ozaukee County compares nationally
Ozaukee County sits at rank 1371 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 652 of 3144 by population (1 is biggest). About 93,956 people live in Ozaukee County, Wisconsin, spread over 233.011 square miles.
Checking a specific address in Ozaukee County
FEMA counts 24,917 residential structures in Ozaukee County overall, 362 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 Ozaukee 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.