How much flood risk does Montgomery County actually carry?
Montgomery County lands at the 95.5th percentile of FEMA's National Risk Index for flooding, "Relatively High" territory — well above 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 2.4 times a year. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Who actually carries the flood insurance FEMA requires
25.4% of the homes FEMA requires to carry flood insurance in Montgomery County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 675 policies against 2,655 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Across all residential structures in Montgomery County, not just the ones FEMA mandates, 0.5% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Montgomery County against the rest of the country
Montgomery County sits at rank 154 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 136 of 3144 by population (1 is biggest). Montgomery County, Ohio covers 461.352 square miles and counts roughly 537,443 residents.
Your street may differ from Montgomery County's average
Across all of Montgomery County's 198,249 residential structures, 946 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 Montgomery 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.