How much flood risk does Ida County actually carry?
Ida County lands at the 18.4th 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
Ida 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 Ida 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.
How Ida County compares nationally
Ida County sits at rank 2605 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2670 of 3144 by population (1 is biggest). Ida County, Iowa is home to about 6,810 people across 431.513 square miles of land.
What to do next if you own or are buying in Ida County
FEMA counts 3,433 residential structures in Ida County overall, 7 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 Ida County's numbers. See the data quality guide for why Ida County, like hundreds of other counties, doesn't get a clean compliance percentage.