How much flood risk does Putnam County actually carry?
Putnam County lands at the 52.8th 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 once every 2 years. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Mandatory flood insurance compliance in Putnam County
Out of 435 homes FEMA counts inside Putnam County's mapped flood zone, 89 carry the flood policy federal law requires there — 20.5% compliance, short of full coverage. Across all residential structures in Putnam County, not just the ones FEMA mandates, 0.8% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Putnam County ranks
Putnam County sits at rank 1544 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1329 of 3144 by population (1 is biggest). About 34,206 people live in Putnam County, Ohio, spread over 482.544 square miles.
What to do next if you own or are buying in Putnam County
FEMA counts 14,345 residential structures in Putnam County overall, 110 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Putnam 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.