How much flood risk does Bryan County actually carry?
Bryan County lands at the 54.1th 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 1 years. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Who actually carries the flood insurance FEMA requires
Out of 313 homes FEMA counts inside Bryan County's mapped flood zone, 17 carry the flood policy federal law requires there — 5.4% compliance, short of full coverage. Across all residential structures in Bryan County, not just the ones FEMA mandates, 0.2% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
How Bryan County compares nationally
Bryan County sits at rank 1507 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1004 of 3144 by population (1 is biggest). About 50,305 people live in Bryan County, Oklahoma, spread over 904.348 square miles.
What to do next if you own or are buying in Bryan County
FEMA counts 19,635 residential structures in Bryan County overall, 29 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 Bryan 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.