Is Decatur County, KS in a flood zone?
FEMA's National Risk Index puts Decatur County's flood hazard at the 7.2th 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. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Mandatory flood insurance compliance in Decatur County
Decatur 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 Decatur 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.
Decatur County against the rest of the country
Decatur County sits at rank 2932 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2983 of 3144 by population (1 is biggest). About 2,716 people live in Decatur County, Kansas, spread over 893.517 square miles.
Your street may differ from Decatur County's average
1 of Decatur County's 2,388 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Decatur County's numbers. See the data quality guide for why Decatur County, like hundreds of other counties, doesn't get a clean compliance percentage.