Is Knox County, TX in a flood zone?
FEMA's National Risk Index puts Knox County's flood hazard at the 5.3th 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. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Knox County's flood-insurance compliance gap
Knox 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 Knox 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.
How Knox County compares nationally
Knox County sits at rank 2986 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2941 of 3144 by population (1 is biggest). About 3,255 people live in Knox County, Texas, spread over 850.621 square miles.
What to do next if you own or are buying in Knox County
1 of Knox County's 1,507 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 Knox County's numbers. See the data quality guide for why Knox County, like hundreds of other counties, doesn't get a clean compliance percentage.