How much flood risk does Oklahoma County actually carry?
Oklahoma County lands at the 97.6th 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 3.1 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.
Oklahoma County's flood-insurance compliance gap
Out of 3,484 homes FEMA counts inside Oklahoma County's mapped flood zone, 643 carry the flood policy federal law requires there — 18.5% compliance, short of full coverage. Across all residential structures in Oklahoma 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.
Where Oklahoma County ranks
Oklahoma County sits at rank 85 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 80 of 3144 by population (1 is biggest). Oklahoma County, Oklahoma is home to about 816,490 people across 708.9 square miles of land.
Your street may differ from Oklahoma County's average
1,251 of Oklahoma County's 260,669 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Oklahoma 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.