Assumption Parish, LA: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Assumption Parish scores at the 78th percentile for flood hazard, rated "Relatively Moderate" — a middling flood hazard by national standards. The hazard here is driven by coastal storm surge rather than inland rivers — FEMA's model puts a surge event here at about 3.7 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 Assumption Parish
28.8% of the homes FEMA requires to carry flood insurance in Assumption Parish — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 767 policies against 2,661 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Looking beyond the mandated zone, 11.8% of all residential structures in Assumption Parish carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Assumption Parish against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Assumption Parish ranks 724 — 1 being the highest hazard nationally — and 1824 by population among all 3144 counties covered here, where 1 is the largest. Assumption Parish, Louisiana covers 344.018 square miles and counts roughly 20,050 residents.
Your street may differ from Assumption Parish's average
FEMA counts 8,423 residential structures in Assumption Parish overall, 995 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
Where Assumption Parish's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Assumption Parish's coastal exposure is covered in the coastal vs. inland flood risk guide, including how storm surge risk differs from river flooding.