Mercer County, WV flood risk explained
Flood hazard in Mercer County sits at the 78.3th 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 2.1 times a year. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Who actually carries the flood insurance FEMA requires
Out of 1,344 homes FEMA counts inside Mercer County's mapped flood zone, 170 carry the flood policy federal law requires there — 12.7% compliance, short of full coverage. Looking beyond the mandated zone, 0.8% of all residential structures in Mercer County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Mercer County compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Mercer County ranks 710 — 1 being the highest hazard nationally — and 919 by population among all 3144 counties covered here, where 1 is the largest. About 57,524 people live in Mercer County, West Virginia, spread over 418.962 square miles.
Checking a specific address in Mercer County
FEMA counts 22,951 residential structures in Mercer County overall, 187 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
Where Mercer 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.