Essex County, NY flood risk explained
Flood hazard in Essex County sits at the 76.9th national percentile, 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 3.1 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.
Mandatory flood insurance compliance in Essex County
FEMA hasn't published a residential structure count for Essex 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, 0.7% of all residential structures in Essex County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Essex County ranks
Among the 3144 US counties FEMA scores for flood hazard, Essex County ranks 759 — 1 being the highest hazard nationally — and 1273 by population among all 3144 counties covered here, where 1 is the largest. Essex County, New York is home to about 36,744 people across 1,794.122 square miles of land.
What to do next if you own or are buying in Essex County
FEMA counts 23,240 residential structures in Essex County overall, 154 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
Where Essex County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Essex 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.