Jackson County, MS flood risk explained
Flood hazard in Jackson County sits at the 86.8th national percentile, well above the national norm for flood hazard; split between inland river flooding (about once every 1 years) and coastal storm surge (about 5.1 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.
Mandatory flood insurance compliance in Jackson County
Out of 13,969 homes FEMA counts inside Jackson County's mapped flood zone, 7,721 carry the flood policy federal law requires there — 55.3% compliance, short of full coverage. Looking beyond the mandated zone, 18.7% of all residential structures in Jackson County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Jackson County ranks
Among the 3144 US counties FEMA scores for flood hazard, Jackson County ranks 434 — 1 being the highest hazard nationally — and 468 by population among all 3144 counties covered here, where 1 is the largest. Jackson County, Mississippi is home to about 147,002 people across 722.825 square miles of land.
Checking a specific address in Jackson County
FEMA counts 55,754 residential structures in Jackson County overall, 10,397 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
Where Jackson County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Jackson County's coastal exposure is covered in the coastal vs. inland flood risk guide, including how storm surge risk differs from river flooding.