How much flood risk does Boone County actually carry?
Boone County lands at the 56.8th percentile of FEMA's National Risk Index for flooding, "Relatively Low" territory — below the national norm for flood hazard — 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. 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 Boone County
19.9% of the homes FEMA requires to carry flood insurance in Boone County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 119 policies against 598 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Across all residential structures in Boone County, not just the ones FEMA mandates, 0.7% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Boone County against the rest of the country
Boone County sits at rank 1421 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 733 of 3144 by population (1 is biggest). Boone County, Indiana is home to about 78,773 people across 422.882 square miles of land.
Checking a specific address in Boone County
162 of Boone County's 24,849 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 Boone 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.