Clatsop County, OR flood risk explained
Flood hazard in Clatsop County sits at the 96.4th national percentile, among the highest flood hazard in the country; driven by coastal storm surge rather than inland rivers — FEMA's model puts a surge event here at about 4.4 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.
Mandatory flood insurance compliance in Clatsop County
Out of 1,586 homes FEMA counts inside Clatsop County's mapped flood zone, 294 carry the flood policy federal law requires there — 18.5% compliance, short of full coverage. Looking beyond the mandated zone, 4.8% of all residential structures in Clatsop County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Clatsop County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Clatsop County ranks 123 — 1 being the highest hazard nationally — and 1172 by population among all 3144 counties covered here, where 1 is the largest. About 41,043 people live in Clatsop County, Oregon, spread over 828.241 square miles.
Checking a specific address in Clatsop County
1,003 of Clatsop County's 20,931 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Clatsop County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Clatsop County's coastal exposure is covered in the coastal vs. inland flood risk guide, including how storm surge risk differs from river flooding.