Is Seneca County, OH in a flood zone?
FEMA's National Risk Index puts Seneca County's flood hazard at the 61.2th percentile nationally — below the national norm for flood hazard — driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 1 times a year. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Mandatory flood insurance compliance in Seneca County
15.9% of the homes FEMA requires to carry flood insurance in Seneca County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 47 policies against 296 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Across all residential structures in Seneca County, not just the ones FEMA mandates, 0.3% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
How Seneca County compares nationally
Seneca County sits at rank 1274 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 949 of 3144 by population (1 is biggest). Seneca County, Ohio covers 551.026 square miles and counts roughly 54,730 residents.
What to do next if you own or are buying in Seneca County
65 of Seneca County's 22,951 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 Seneca 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.