Is Marion County, TX in a flood zone?
FEMA's National Risk Index puts Marion County's flood hazard at the 26th 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 5 years. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Mandatory flood insurance compliance in Marion County
Marion 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 Marion County, not just the ones FEMA mandates, 0.3% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
How Marion County compares nationally
Marion County sits at rank 2375 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2436 of 3144 by population (1 is biggest). Marion County, Texas covers 380.902 square miles and counts roughly 9,704 residents.
Your street may differ from Marion County's average
Across all of Marion County's 4,273 residential structures, 11 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 Marion County's numbers. See the data quality guide for why Marion County, like hundreds of other counties, doesn't get a clean compliance percentage.