How much flood risk does Genesee County actually carry?
Genesee County lands at the 92.6th percentile of FEMA's National Risk Index for flooding, "Relatively Moderate" territory — a middling flood hazard by national standards — 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. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Who actually carries the flood insurance FEMA requires
Out of 1,058 homes FEMA counts inside Genesee County's mapped flood zone, 215 carry the flood policy federal law requires there — 20.3% compliance, short of full coverage. Across all residential structures in Genesee 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.
Genesee County against the rest of the country
Genesee County sits at rank 250 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 188 of 3144 by population (1 is biggest). About 402,279 people live in Genesee County, Michigan, spread over 636.946 square miles.
What to do next if you own or are buying in Genesee County
FEMA counts 156,025 residential structures in Genesee County overall, 330 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 Genesee 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.