Is Clark County, ID in a flood zone?
FEMA's National Risk Index puts Clark County's flood hazard at the 2.1th 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 4 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
Clark 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 Clark County, not just the ones FEMA mandates, 0% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Clark County ranks
Clark County sits at rank 3084 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 3120 of 3144 by population (1 is biggest). Clark County, Idaho is home to about 794 people across 1,763.145 square miles of land.
Your street may differ from Clark County's average
0 of Clark County's 566 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 Clark County's numbers. See the data quality guide for why Clark County, like hundreds of other counties, doesn't get a clean compliance percentage.