How much flood risk does Shelby County actually carry?
Shelby County lands at the 63.3th 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 1.9 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 Shelby County
19.5% 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: 104 policies against 533 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Across all residential structures in Shelby 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.
Shelby County against the rest of the country
Shelby County sits at rank 1205 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1036 of 3144 by population (1 is biggest). About 47,952 people live in Shelby County, Ohio, spread over 407.691 square miles.
Your street may differ from Shelby County's average
115 of Shelby County's 17,674 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 Shelby 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.