Is Weston County, WY in a flood zone?
FEMA's National Risk Index puts Weston County's flood hazard at the 8.2th percentile nationally — among the lowest flood hazard in the country — driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about once every 2 years. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Who actually carries the flood insurance FEMA requires
Weston 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 Weston County, not just the ones FEMA mandates, 0.1% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Weston County against the rest of the country
Weston County sits at rank 2899 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2669 of 3144 by population (1 is biggest). About 6,866 people live in Weston County, Wyoming, spread over 2,398.005 square miles.
Your street may differ from Weston County's average
Across all of Weston County's 4,468 residential structures, 4 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 Weston County's numbers. See the data quality guide for why Weston County, like hundreds of other counties, doesn't get a clean compliance percentage.