Somerset County, PA: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Somerset County scores at the 80th 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 1.8 times a year. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Who actually carries the flood insurance FEMA requires
16.3% of the homes FEMA requires to carry flood insurance in Somerset County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 221 policies against 1,357 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Looking beyond the mandated zone, 0.9% of all residential structures in Somerset County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Somerset County compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Somerset County ranks 657 — 1 being the highest hazard nationally — and 768 by population among all 3144 counties covered here, where 1 is the largest. Somerset County, Pennsylvania covers 1,075.047 square miles and counts roughly 72,134 residents.
What to do next if you own or are buying in Somerset County
257 of Somerset County's 29,888 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Somerset 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.