How much flood risk does Somerset County actually carry?
Somerset County lands at the 61.8th percentile of FEMA's National Risk Index for flooding, "Relatively Low" territory — below the national norm for flood hazard — with the hazard driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 4.1 times a year. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Somerset County's flood-insurance compliance gap
Somerset County is one of the counties where FEMA's own denominator for mandated flood-zone structures is missing, so no compliance rate is shown rather than a guessed one — the data quality guide covers how common this is. Across all residential structures in Somerset County, not just the ones FEMA mandates, 0.6% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Somerset County ranks
Somerset County sits at rank 1254 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 991 of 3144 by population (1 is biggest). Somerset County, Maine is home to about 51,338 people across 3,924.289 square miles of land.
Checking a specific address in Somerset County
Across all of Somerset County's 24,796 residential structures, 144 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Somerset County's numbers. See the data quality guide for why Somerset County, like hundreds of other counties, doesn't get a clean compliance percentage.