Is Platte County, WY in a flood zone?
FEMA's National Risk Index puts Platte County's flood hazard at the 33.2th 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 1 years. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Platte County's flood-insurance compliance gap
Platte 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 Platte 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.
Platte County against the rest of the country
Platte County sits at rank 2161 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2535 of 3144 by population (1 is biggest). Platte County, Wyoming covers 2,081.459 square miles and counts roughly 8,512 residents.
Your street may differ from Platte County's average
Across all of Platte County's 5,350 residential structures, 7 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 Platte County's numbers. See the data quality guide for why Platte County, like hundreds of other counties, doesn't get a clean compliance percentage.