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Flood zone · Louisiana

Flood zone in Louisiana

Flood zone (FEMA NFHL) data for ZIP codes in Louisiana. Pick a ZIP below to dive into the flood zone summary.

Last verified 2026-05-13 · methodology

What lands here

Pages show the flood zone code, what it means in plain English (1% annual chance zone, 0.2% annual chance zone, or outside mapped hazard), and the base flood elevation where assigned.

Source & refresh

FEMA NFHL. Refreshed quarterly loma updates. Primary source →

Louisiana top concern

Hurricanes, subsidence, lead service lines

Louisiana has extensive FEMA AE/VE coverage along the Gulf and Mississippi Delta. Subsidence in southeastern LA accelerates flood risk faster than FIRM panel revisions can capture. New Orleans + Baton Rouge both carry significant LCRR lead-service-line obligations.

See Louisiana state page for the full state-level rollup across all 12 dimensions.

Read more on flood zone

Editorial deep-dives explaining the source data, its limits, and how to read it.

4 Louisiana ZIPs