How much flood risk does Whitman County actually carry?
Whitman County lands at the 58.8th percentile of FEMA's National Risk Index for flooding, "Relatively Low" territory — below the national norm for flood hazard — with the hazard driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about once every 1 years. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Whitman County's flood-insurance compliance gap
Whitman 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 Whitman 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.
Whitman County against the rest of the country
Whitman County sits at rank 1355 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1029 of 3144 by population (1 is biggest). Whitman County, Washington covers 2,159.262 square miles and counts roughly 48,399 residents.
What to do next if you own or are buying in Whitman County
41 of Whitman County's 12,092 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 Whitman County's numbers. See the data quality guide for why Whitman County, like hundreds of other counties, doesn't get a clean compliance percentage.