Alexandria city, VA: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Alexandria city scores at the 81.8th 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 1.4 times a year. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Mandatory flood insurance compliance in Alexandria city
FEMA hasn't published a residential structure count for Alexandria city'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, 2.4% of all residential structures in Alexandria city carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Alexandria city ranks
Among the 3144 US counties FEMA scores for flood hazard, Alexandria city ranks 597 — 1 being the highest hazard nationally — and 441 by population among all 3144 counties covered here, where 1 is the largest. Alexandria city, Virginia is home to about 159,102 people across 14.935 square miles of land.
Checking a specific address in Alexandria city
Across all of Alexandria city's 42,132 residential structures, 991 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Alexandria city's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Alexandria city'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.