Sebastian County, AR flood risk explained
Flood hazard in Sebastian County sits at the 86.1th national percentile, a middling flood hazard by national standards; driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 3.2 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.
Sebastian County's flood-insurance compliance gap
18.1% of the homes FEMA requires to carry flood insurance in Sebastian County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 188 policies against 1,039 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Looking beyond the mandated zone, 0.6% of all residential structures in Sebastian County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Sebastian County ranks
Among the 3144 US counties FEMA scores for flood hazard, Sebastian County ranks 461 — 1 being the highest hazard nationally — and 507 by population among all 3144 counties covered here, where 1 is the largest. Sebastian County, Arkansas covers 531.184 square miles and counts roughly 130,035 residents.
Checking a specific address in Sebastian County
Across all of Sebastian County's 47,501 residential structures, 290 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Sebastian 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.