Is Somerset County, NJ in a flood zone?
FEMA's National Risk Index puts Somerset County's flood hazard at the 95th percentile nationally — well above the national norm for flood hazard — driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 6.3 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.
Who actually carries the flood insurance FEMA requires
Out of 1,323 homes FEMA counts inside Somerset County's mapped flood zone, 702 carry the flood policy federal law requires there — 53.1% compliance, short of full coverage. Across all residential structures in Somerset County, not just the ones FEMA mandates, 1.4% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Somerset County against the rest of the country
Somerset County sits at rank 171 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 212 of 3144 by population (1 is biggest). Somerset County, New Jersey covers 301.873 square miles and counts roughly 357,467 residents.
Your street may differ from Somerset County's average
FEMA counts 104,223 residential structures in Somerset County overall, 1,407 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Somerset County's numbers. The guide to what the Special Flood Hazard Area actually means explains why the mandatory-insurance rule exists and who it applies to.