Is Sheridan County, WY in a flood zone?
FEMA's National Risk Index puts Sheridan County's flood hazard at the 74.4th 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 1 years. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Sheridan County's flood-insurance compliance gap
Out of 497 homes FEMA counts inside Sheridan County's mapped flood zone, 31 carry the flood policy federal law requires there — 6.2% compliance, short of full coverage. Across all residential structures in Sheridan 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.
Where Sheridan County ranks
Sheridan County sits at rank 842 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1369 of 3144 by population (1 is biggest). Sheridan County, Wyoming covers 2,523.361 square miles and counts roughly 32,978 residents.
Your street may differ from Sheridan County's average
FEMA counts 14,493 residential structures in Sheridan County overall, 50 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 Sheridan 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.