Is Ross County, OH in a flood zone?
FEMA's National Risk Index puts Ross County's flood hazard at the 74.5th percentile nationally — a middling flood hazard by national standards — driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 2.4 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 Ross County
Homes with a federally backed mortgage inside Ross County's mapped high-risk flood zone (the Special Flood Hazard Area, or SFHA) are legally required to carry an NFIP flood policy. In practice, 8.8% of them do — 60 active policies against 683 structures FEMA counts in that zone, leaving a real compliance gap. Across all residential structures in Ross 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.
Ross County against the rest of the country
Ross County sits at rank 837 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 747 of 3144 by population (1 is biggest). About 76,046 people live in Ross County, Ohio, spread over 689.166 square miles.
Your street may differ from Ross County's average
Across all of Ross County's 31,848 residential structures, 80 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Ross 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.