Is Caribou County, ID in a flood zone?
FEMA's National Risk Index puts Caribou County's flood hazard at the 10.7th 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 3 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
Caribou 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 Caribou 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.
How Caribou County compares nationally
Caribou County sits at rank 2828 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2640 of 3144 by population (1 is biggest). Caribou County, Idaho covers 1,764.194 square miles and counts roughly 7,239 residents.
Checking a specific address in Caribou County
Across all of Caribou County's 3,835 residential structures, 2 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 Caribou County's numbers. See the data quality guide for why Caribou County, like hundreds of other counties, doesn't get a clean compliance percentage.