How much flood risk does Osceola County actually carry?
Osceola County lands at the 14.9th 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 3 years. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Osceola County's flood-insurance compliance gap
Osceola 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 Osceola County, not just the ones FEMA mandates, 0.4% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Osceola County against the rest of the country
Osceola County sits at rank 2707 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2729 of 3144 by population (1 is biggest). Osceola County, Iowa is home to about 6,036 people across 398.687 square miles of land.
What to do next if you own or are buying in Osceola County
12 of Osceola County's 2,893 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 Osceola County's numbers. See the data quality guide for why Osceola County, like hundreds of other counties, doesn't get a clean compliance percentage.