How much flood risk does Marion County actually carry?
Marion County lands at the 36th 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 1.2 times a year. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Marion County's flood-insurance compliance gap
2.9% of the homes FEMA requires to carry flood insurance in Marion County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 8 policies against 275 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Across all residential structures in Marion County, not just the ones FEMA mandates, 0.2% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Marion County ranks
Marion County sits at rank 2075 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2306 of 3144 by population (1 is biggest). About 11,670 people live in Marion County, Kansas, spread over 944.299 square miles.
Checking a specific address in Marion County
FEMA counts 7,878 residential structures in Marion County overall, 12 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 Marion 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.