Is Hawaii County, HI in a flood zone?
FEMA's National Risk Index puts Hawaii County's flood hazard at the 98.9th percentile nationally — well above the national norm for flood hazard — driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 5.6 times a year. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Hawaii County's flood-insurance compliance gap
Hawaii County 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 Hawaii County, not just the ones FEMA mandates, 1.8% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Hawaii County ranks
Hawaii County sits at rank 42 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 340 of 3144 by population (1 is biggest). Hawaii County, Hawaii covers 4,028.431 square miles and counts roughly 209,790 residents.
Your street may differ from Hawaii County's average
1,215 of Hawaii County's 69,412 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Hawaii County's numbers. See the data quality guide for why Hawaii County, like hundreds of other counties, doesn't get a clean compliance percentage.