Is Cumberland County, PA in a flood zone?
FEMA's National Risk Index puts Cumberland County's flood hazard at the 91.1th percentile nationally — 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 2.1 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 Cumberland County
Homes with a federally backed mortgage inside Cumberland 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, 20.6% of them do — 357 active policies against 1,735 structures FEMA counts in that zone, leaving a real compliance gap. Across all residential structures in Cumberland County, not just the ones FEMA mandates, 0.7% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Cumberland County ranks
Cumberland County sits at rank 300 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 266 of 3144 by population (1 is biggest). Cumberland County, Pennsylvania covers 545.483 square miles and counts roughly 275,516 residents.
Checking a specific address in Cumberland County
Across all of Cumberland County's 80,415 residential structures, 555 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 Cumberland 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.