Marion County, AR: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Marion County scores at the 43.1th percentile for flood hazard, rated "Relatively Low" — below 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 1.1 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.
Who actually carries the flood insurance FEMA requires
FEMA hasn't published a residential structure count for Marion County's mapped flood zone, so a reliable mandatory-compliance percentage can't be computed here — see the data quality guide for why this gap exists for roughly a quarter of US counties. Looking beyond the mandated zone, 0.2% of all residential structures in Marion County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Marion County ranks
Among the 3144 US counties FEMA scores for flood hazard, Marion County ranks 1851 — 1 being the highest hazard nationally — and 1953 by population among all 3144 counties covered here, where 1 is the largest. Marion County, Arkansas is home to about 17,593 people across 596.598 square miles of land.
What to do next if you own or are buying in Marion County
Across all of Marion County's 6,982 residential structures, 11 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Marion County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Marion County's compliance figure is one of the ones affected by FEMA's incomplete denominator data — the data quality guide explains what that means and how many counties it touches.