How much flood risk does Yakima County actually carry?
Yakima County lands at the 92.9th percentile of FEMA's National Risk Index for flooding, "Relatively Moderate" territory — a middling flood hazard by national standards — with the hazard driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 1.5 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.
Yakima County's flood-insurance compliance gap
Homes with a federally backed mortgage inside Yakima County's mapped high-risk flood zone (the Special Flood Hazard Area, or SFHA) are legally required to carry an NFIP flood policy. In practice, 15.7% of them do — 646 active policies against 4,105 structures FEMA counts in that zone, leaving a real compliance gap. Across all residential structures in Yakima County, not just the ones FEMA mandates, 0.9% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Yakima County ranks
Yakima County sits at rank 241 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 285 of 3144 by population (1 is biggest). Yakima County, Washington covers 4,294.512 square miles and counts roughly 258,523 residents.
What to do next if you own or are buying in Yakima County
FEMA counts 82,752 residential structures in Yakima County overall, 721 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 Yakima County's numbers. The guide to what the Special Flood Hazard Area actually means explains why the mandatory-insurance rule exists and who it applies to.