Powder River County, MT flood risk explained
Flood hazard in Powder River County sits at the 7.8th national percentile, 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 1 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
FEMA hasn't published a residential structure count for Powder River 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, 0.1% of all residential structures in Powder River County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Powder River County compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Powder River County ranks 2914 — 1 being the highest hazard nationally — and 3062 by population among all 3144 counties covered here, where 1 is the largest. About 1,734 people live in Powder River County, Montana, spread over 3,298.196 square miles.
Your street may differ from Powder River County's average
2 of Powder River County's 2,118 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Powder River County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Powder River 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.