How much flood risk does Oregon County actually carry?
Oregon County lands at the 46.4th 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 1.8 times a year. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Oregon County's flood-insurance compliance gap
Homes with a federally backed mortgage inside Oregon 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, 3% of them do — 6 active policies against 198 structures FEMA counts in that zone, leaving a real compliance gap. Across all residential structures in Oregon County, not just the ones FEMA mandates, 0.1% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Oregon County ranks
Oregon County sits at rank 1747 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2513 of 3144 by population (1 is biggest). About 8,699 people live in Oregon County, Missouri, spread over 789.844 square miles.
Checking a specific address in Oregon County
Across all of Oregon County's 7,803 residential structures, 6 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 Oregon 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.