Johnson County, WY: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Johnson County scores at the 36.9th percentile for flood hazard, rated "Relatively Low" — below the national norm for flood hazard. The hazard here is 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. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Johnson County's flood-insurance compliance gap
FEMA hasn't published a residential structure count for Johnson County's mapped flood zone, so a reliable mandatory-compliance percentage can't be computed here — see the data quality guide for why this gap exists for roughly a quarter of US counties. Looking beyond the mandated zone, 0.3% of all residential structures in Johnson County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Johnson County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Johnson County ranks 2049 — 1 being the highest hazard nationally — and 2507 by population among all 3144 counties covered here, where 1 is the largest. About 8,803 people live in Johnson County, Wyoming, spread over 4,154.152 square miles.
Your street may differ from Johnson County's average
Across all of Johnson County's 5,527 residential structures, 15 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Johnson County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Johnson County's compliance figure is one of the ones affected by FEMA's incomplete denominator data — the data quality guide explains what that means and how many counties it touches.