How much flood risk does Campbell County actually carry?
Campbell County lands at the 40.2th 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. 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
7.2% of the homes FEMA requires to carry flood insurance in Campbell County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 9 policies against 125 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Across all residential structures in Campbell 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.
Where Campbell County ranks
Campbell County sits at rank 1941 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1037 of 3144 by population (1 is biggest). About 47,946 people live in Campbell County, Wyoming, spread over 4,802.065 square miles.
Your street may differ from Campbell County's average
18 of Campbell County's 20,810 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 Campbell 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.