Is King William County, VA in a flood zone?
FEMA's National Risk Index puts King William County's flood hazard at the 50.6th percentile nationally — below the national norm for flood hazard — driven by coastal storm surge rather than inland rivers — FEMA's model puts a surge event here at about 3.7 times a year. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Who actually carries the flood insurance FEMA requires
34.4% of the homes FEMA requires to carry flood insurance in King William County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 42 policies against 122 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Across all residential structures in King William County, not just the ones FEMA mandates, 0.9% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where King William County ranks
King William County sits at rank 1616 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1871 of 3144 by population (1 is biggest). About 19,232 people live in King William County, Virginia, spread over 273.91 square miles.
Your street may differ from King William County's average
64 of King William County's 7,403 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed King William County's numbers. Because storm surge plays a real role here, the guide to coastal vs. inland flood hazard is worth reading alongside this page.