Is Benton County, WA in a flood zone?
FEMA's National Risk Index puts Benton County's flood hazard at the 89.7th percentile nationally — a middling flood hazard by national standards — driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about once every 3 years. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Benton County's flood-insurance compliance gap
Benton 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 Benton County, not just the ones FEMA mandates, 0.3% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
How Benton County compares nationally
Benton County sits at rank 340 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 326 of 3144 by population (1 is biggest). Benton County, Washington is home to about 218,190 people across 1,700.128 square miles of land.
Your street may differ from Benton County's average
FEMA counts 68,120 residential structures in Benton County overall, 188 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Benton County's numbers. See the data quality guide for why Benton County, like hundreds of other counties, doesn't get a clean compliance percentage.