Is Terrebonne Parish, LA in a flood zone?
FEMA's National Risk Index puts Terrebonne Parish's flood hazard at the 94th percentile nationally — well above the national norm for flood hazard — driven by coastal storm surge rather than inland rivers — FEMA's model puts a surge event here at about 4.2 times a year. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Who actually carries the flood insurance FEMA requires
Terrebonne Parish is one of the counties where FEMA's own denominator for mandated flood-zone structures is missing, so no compliance rate is shown rather than a guessed one — the data quality guide covers how common this is. Across all residential structures in Terrebonne Parish, not just the ones FEMA mandates, 32.2% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Terrebonne Parish ranks
Terrebonne Parish sits at rank 207 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 603 of 3144 by population (1 is biggest). Terrebonne Parish, Louisiana covers 1,229.885 square miles and counts roughly 103,864 residents.
Your street may differ from Terrebonne Parish's average
Across all of Terrebonne Parish's 33,598 residential structures, 10,803 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Terrebonne Parish's numbers. See the data quality guide for why Terrebonne Parish, like hundreds of other counties, doesn't get a clean compliance percentage.