Is Nemaha County, KS in a flood zone?
FEMA's National Risk Index puts Nemaha County's flood hazard at the 23.3th 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 1 years. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Nemaha County's flood-insurance compliance gap
Nemaha 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 Nemaha 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.
Where Nemaha County ranks
Nemaha County sits at rank 2452 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2400 of 3144 by population (1 is biggest). About 10,062 people live in Nemaha County, Kansas, spread over 717.427 square miles.
What to do next if you own or are buying in Nemaha County
2 of Nemaha County's 7,436 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 Nemaha County's numbers. See the data quality guide for why Nemaha County, like hundreds of other counties, doesn't get a clean compliance percentage.