Strafford County, NH: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Strafford County scores at the 76th percentile for flood hazard, rated "Relatively Moderate" — a middling flood hazard by national standards. 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.
Mandatory flood insurance compliance in Strafford County
Out of 635 homes FEMA counts inside Strafford County's mapped flood zone, 92 carry the flood policy federal law requires there — 14.5% compliance, short of full coverage. Looking beyond the mandated zone, 0.6% of all residential structures in Strafford County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Strafford County ranks
Among the 3144 US counties FEMA scores for flood hazard, Strafford County ranks 787 — 1 being the highest hazard nationally — and 491 by population among all 3144 counties covered here, where 1 is the largest. About 134,202 people live in Strafford County, New Hampshire, spread over 367.479 square miles.
Your street may differ from Strafford County's average
198 of Strafford County's 34,531 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Strafford 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.