Shelby County, IA Flood Zone & Flood Risk Data
Shelby County, IA: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Shelby County scores at the 19.5th percentile for flood hazard, rated "Very Low", among the lowest flood hazard in the country. The hazard here is driven by inland rivers and flash flooding rather than the coast, FEMA's model puts a flood event here at about once every 7 years. That's a county-wide figure, not a per-address one, FEMA's parcel maps are a live lookup, not a bulk file.
Mandatory flood insurance compliance in Shelby County
11.8% of the homes FEMA requires to carry flood insurance in Shelby County, those inside the mapped Special Flood Hazard Area, actually have a policy in force: 14 policies against 119 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Looking beyond the mandated zone, 0.3% of all residential structures in Shelby County carry flood coverage voluntarily or otherwise, relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Shelby County ranks
Among the 3144 US counties FEMA scores for flood hazard, Shelby County ranks 2573, 1 being the highest hazard nationally, and 2293 by population among all 3144 counties covered here, where 1 is the largest. About 11,821 people live in Shelby County, Iowa, spread over 590.776 square miles.
Checking a specific address in Shelby County
19 of Shelby County's 5,889 residential structures carry flood coverage of some kind, per FEMA's latest count, useful context, not a substitute for checking one parcel.
Where Shelby County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. If you're unsure why any of this insurance requirement exists at all, the SFHA explainer covers it from first principles.