Lafourche Parish, LA flood risk explained
Flood hazard in Lafourche Parish sits at the 81.8th national percentile, a middling flood hazard by national standards; driven by coastal storm surge rather than inland rivers — FEMA's model puts a surge event here at about 3.9 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.
Lafourche Parish's flood-insurance compliance gap
FEMA hasn't published a residential structure count for Lafourche Parish'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, 23% of all residential structures in Lafourche Parish carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Lafourche Parish ranks
Among the 3144 US counties FEMA scores for flood hazard, Lafourche Parish ranks 598 — 1 being the highest hazard nationally — and 648 by population among all 3144 counties covered here, where 1 is the largest. About 95,342 people live in Lafourche Parish, Louisiana, spread over 1,069.696 square miles.
Your street may differ from Lafourche Parish's average
Across all of Lafourche Parish's 34,592 residential structures, 7,963 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Lafourche Parish's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Lafourche Parish'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.