Is Idaho County, ID in a flood zone?
FEMA's National Risk Index puts Idaho County's flood hazard at the 72.9th percentile nationally — below the national norm for flood hazard — 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. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Mandatory flood insurance compliance in Idaho County
Idaho 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 Idaho 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.
Idaho County against the rest of the country
Idaho County sits at rank 892 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1938 of 3144 by population (1 is biggest). About 17,912 people live in Idaho County, Idaho, spread over 8,477.499 square miles.
What to do next if you own or are buying in Idaho County
Across all of Idaho County's 10,627 residential structures, 10 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 Idaho County's numbers. See the data quality guide for why Idaho County, like hundreds of other counties, doesn't get a clean compliance percentage.