How much flood risk does Pottawattamie County actually carry?
Pottawattamie County lands at the 74.6th 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 1.3 times a year. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Pottawattamie County's flood-insurance compliance gap
Homes with a federally backed mortgage inside Pottawattamie County's mapped high-risk flood zone (the Special Flood Hazard Area, or SFHA) are legally required to carry an NFIP flood policy. In practice, 17.6% of them do — 403 active policies against 2,286 structures FEMA counts in that zone, leaving a real compliance gap. Across all residential structures in Pottawattamie County, not just the ones FEMA mandates, 1.3% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Pottawattamie County ranks
Pottawattamie County sits at rank 835 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 655 of 3144 by population (1 is biggest). About 93,529 people live in Pottawattamie County, Iowa, spread over 951.284 square miles.
What to do next if you own or are buying in Pottawattamie County
557 of Pottawattamie County's 41,683 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Pottawattamie 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.