York County, ME: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, York County scores at the 86.6th percentile for flood hazard, rated "Relatively High" — well above the national norm for flood hazard. The hazard here is split between inland river flooding (about 1.1 times a year) and coastal storm surge (about 8.1 times a year). This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
York County's flood-insurance compliance gap
FEMA hasn't published a residential structure count for York County's mapped flood zone, so a reliable mandatory-compliance percentage can't be computed here — see the data quality guide for why this gap exists for roughly a quarter of US counties. Looking beyond the mandated zone, 3.4% of all residential structures in York County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where York County ranks
Among the 3144 US counties FEMA scores for flood hazard, York County ranks 441 — 1 being the highest hazard nationally — and 325 by population among all 3144 counties covered here, where 1 is the largest. York County, Maine covers 991.194 square miles and counts roughly 220,143 residents.
Checking a specific address in York County
Across all of York County's 82,954 residential structures, 2,796 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where York County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. York County's compliance figure is one of the ones affected by FEMA's incomplete denominator data — the data quality guide explains what that means and how many counties it touches.