How much flood risk does Chesterfield County actually carry?
Chesterfield County lands at the 65.8th percentile of FEMA's National Risk Index for flooding, "Relatively Low" territory — below the national norm for flood hazard — with the hazard driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about once every 1 years. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Chesterfield County's flood-insurance compliance gap
Out of 88 homes FEMA counts inside Chesterfield County's mapped flood zone, 5 carry the flood policy federal law requires there — 5.7% compliance, short of full coverage. Across all residential structures in Chesterfield County, not just the ones FEMA mandates, 0.1% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Chesterfield County ranks
Chesterfield County sits at rank 1123 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1105 of 3144 by population (1 is biggest). Chesterfield County, South Carolina is home to about 44,488 people across 798.986 square miles of land.
Your street may differ from Chesterfield County's average
FEMA counts 25,519 residential structures in Chesterfield County overall, 18 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Chesterfield County's numbers. The guide to what the Special Flood Hazard Area actually means explains why the mandatory-insurance rule exists and who it applies to.