Is Dickinson County, IA in a flood zone?
FEMA's National Risk Index puts Dickinson County's flood hazard at the 49.9th percentile nationally — below the national norm for flood hazard — driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 2.8 times a year. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Dickinson County's flood-insurance compliance gap
Dickinson 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 Dickinson 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.
Dickinson County against the rest of the country
Dickinson County sits at rank 1637 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1925 of 3144 by population (1 is biggest). Dickinson County, Iowa covers 380.532 square miles and counts roughly 18,158 residents.
What to do next if you own or are buying in Dickinson County
Across all of Dickinson County's 17,694 residential structures, 31 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 Dickinson County's numbers. See the data quality guide for why Dickinson County, like hundreds of other counties, doesn't get a clean compliance percentage.