Is Codington County, SD in a flood zone?
FEMA's National Risk Index puts Codington County's flood hazard at the 65.2th 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 1.7 times a year. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Codington County's flood-insurance compliance gap
Out of 1,160 homes FEMA counts inside Codington County's mapped flood zone, 223 carry the flood policy federal law requires there — 19.2% compliance, short of full coverage. Across all residential structures in Codington County, not just the ones FEMA mandates, 1.9% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
How Codington County compares nationally
Codington County sits at rank 1144 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1462 of 3144 by population (1 is biggest). Codington County, South Dakota is home to about 29,278 people across 687.585 square miles of land.
What to do next if you own or are buying in Codington County
Across all of Codington County's 12,851 residential structures, 243 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 Codington 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.