How much flood risk does Martin County actually carry?
Martin County lands at the 39.3th 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 2 years. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Who actually carries the flood insurance FEMA requires
Martin County is one of the counties where FEMA's own denominator for mandated flood-zone structures is missing, so no compliance rate is shown rather than a guessed one — the data quality guide covers how common this is. Across all residential structures in Martin County, not just the ones FEMA mandates, 0% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Martin County against the rest of the country
Martin County sits at rank 1970 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1853 of 3144 by population (1 is biggest). Martin County, Minnesota covers 712.336 square miles and counts roughly 19,561 residents.
Checking a specific address in Martin County
Across all of Martin County's 11,700 residential structures, 0 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Martin County's numbers. See the data quality guide for why Martin County, like hundreds of other counties, doesn't get a clean compliance percentage.