Is San Juan County, UT in a flood zone?
FEMA's National Risk Index puts San Juan County's flood hazard at the 24th 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 1.9 times a year. 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
San Juan 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 San Juan 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 San Juan County ranks
San Juan County sits at rank 2430 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2117 of 3144 by population (1 is biggest). About 14,601 people live in San Juan County, Utah, spread over 7,823.687 square miles.
Your street may differ from San Juan County's average
FEMA counts 5,642 residential structures in San Juan County overall, 4 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 San Juan County's numbers. See the data quality guide for why San Juan County, like hundreds of other counties, doesn't get a clean compliance percentage.