Rockland County, NY: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Rockland County scores at the 91.8th 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 2.9 times a year. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Rockland County's flood-insurance compliance gap
Out of 793 homes FEMA counts inside Rockland County's mapped flood zone, 395 carry the flood policy federal law requires there — 49.8% compliance, short of full coverage. Looking beyond the mandated zone, 1.3% of all residential structures in Rockland County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Rockland County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Rockland County ranks 274 — 1 being the highest hazard nationally — and 216 by population among all 3144 counties covered here, where 1 is the largest. Rockland County, New York covers 173.685 square miles and counts roughly 348,144 residents.
Your street may differ from Rockland County's average
990 of Rockland County's 78,752 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Rockland 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.