Is Jerauld County, SD in a flood zone?
FEMA's National Risk Index puts Jerauld County's flood hazard at the 8.4th percentile nationally — among the lowest flood hazard in the country — driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about once every 4 years. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Jerauld County's flood-insurance compliance gap
Jerauld 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 Jerauld County, not just the ones FEMA mandates, 0.1% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Jerauld County ranks
Jerauld County sits at rank 2895 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 3069 of 3144 by population (1 is biggest). Jerauld County, South Dakota covers 526.133 square miles and counts roughly 1,689 residents.
What to do next if you own or are buying in Jerauld County
Across all of Jerauld County's 2,118 residential structures, 1 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 Jerauld County's numbers. See the data quality guide for why Jerauld County, like hundreds of other counties, doesn't get a clean compliance percentage.