Tulsa County, OK: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Tulsa County scores at the 97.9th percentile for flood hazard, rated "Relatively High" — well above the national norm for flood hazard. The hazard here is driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 4.8 times a year. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Mandatory flood insurance compliance in Tulsa County
21.9% of the homes FEMA requires to carry flood insurance in Tulsa County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 750 policies against 3,419 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Looking beyond the mandated zone, 0.7% of all residential structures in Tulsa County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Tulsa County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Tulsa County ranks 74 — 1 being the highest hazard nationally — and 101 by population among all 3144 counties covered here, where 1 is the largest. About 693,514 people live in Tulsa County, Oklahoma, spread over 570.242 square miles.
Your street may differ from Tulsa County's average
Across all of Tulsa County's 221,015 residential structures, 1,553 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Tulsa County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. If you're unsure why any of this insurance requirement exists at all, the SFHA explainer covers it from first principles.