Cheshire County, NH flood risk explained
Flood hazard in Cheshire County sits at the 74.8th national percentile, a middling flood hazard by national standards; driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 1.3 times a year. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Mandatory flood insurance compliance in Cheshire County
Homes with a federally backed mortgage inside Cheshire County's mapped high-risk flood zone (the Special Flood Hazard Area, or SFHA) are legally required to carry an NFIP flood policy. In practice, 20.9% of them do — 159 active policies against 762 structures FEMA counts in that zone, leaving a real compliance gap. Looking beyond the mandated zone, 0.9% of all residential structures in Cheshire County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Cheshire County ranks
Among the 3144 US counties FEMA scores for flood hazard, Cheshire County ranks 827 — 1 being the highest hazard nationally — and 739 by population among all 3144 counties covered here, where 1 is the largest. About 78,078 people live in Cheshire County, New Hampshire, spread over 706.725 square miles.
What to do next if you own or are buying in Cheshire County
Across all of Cheshire County's 25,084 residential structures, 227 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Cheshire 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.