Sanders County, MT: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Sanders County scores at the 61.9th 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.
Sanders County's flood-insurance compliance gap
5.3% of the homes FEMA requires to carry flood insurance in Sanders County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 16 policies against 301 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Looking beyond the mandated zone, 0.4% of all residential structures in Sanders County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Sanders County compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Sanders County ranks 1251 — 1 being the highest hazard nationally — and 2166 by population among all 3144 counties covered here, where 1 is the largest. Sanders County, Montana is home to about 13,895 people across 2,760.4 square miles of land.
Your street may differ from Sanders County's average
Across all of Sanders County's 7,321 residential structures, 26 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Sanders County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. If you're unsure why any of this insurance requirement exists at all, the SFHA explainer covers it from first principles.