Sherman County, OR flood risk explained
Flood hazard in Sherman County sits at the 4.6th 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 28 years. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Who actually carries the flood insurance FEMA requires
FEMA hasn't published a residential structure count for Sherman 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 Sherman County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Sherman County compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Sherman County ranks 3006 — 1 being the highest hazard nationally — and 3042 by population among all 3144 counties covered here, where 1 is the largest. About 2,002 people live in Sherman County, Oregon, spread over 823.614 square miles.
Your street may differ from Sherman County's average
1 of Sherman County's 916 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Sherman County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Sherman 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.