How much flood risk does Seneca County actually carry?
Seneca County lands at the 63.6th 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 once every 2 years. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Seneca County's flood-insurance compliance gap
Seneca 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 Seneca County, not just the ones FEMA mandates, 0.9% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Seneca County against the rest of the country
Seneca County sits at rank 1195 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1377 of 3144 by population (1 is biggest). Seneca County, New York is home to about 32,650 people across 323.699 square miles of land.
Checking a specific address in Seneca County
123 of Seneca County's 13,746 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. See the data quality guide for why Seneca County, like hundreds of other counties, doesn't get a clean compliance percentage.