Is Todd County, SD in a flood zone?
FEMA's National Risk Index puts Todd County's flood hazard at the 28.3th 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 2 years. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Todd County's flood-insurance compliance gap
Todd 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 Todd 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.
Todd County against the rest of the country
Todd County sits at rank 2306 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2475 of 3144 by population (1 is biggest). Todd County, South Dakota is home to about 9,172 people across 1,388.593 square miles of land.
Your street may differ from Todd County's average
Across all of Todd County's 2,524 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 Todd County's numbers. See the data quality guide for why Todd County, like hundreds of other counties, doesn't get a clean compliance percentage.