How much flood risk does Hamilton County actually carry?
Hamilton County lands at the 17.1th percentile of FEMA's National Risk Index for flooding, "Very Low" territory — among the lowest flood hazard in the country — with the hazard driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 1 times a year. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Hamilton County's flood-insurance compliance gap
Hamilton 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 Hamilton 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.
Where Hamilton County ranks
Hamilton County sits at rank 2642 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2519 of 3144 by population (1 is biggest). About 8,644 people live in Hamilton County, Texas, spread over 835.915 square miles.
What to do next if you own or are buying in Hamilton County
FEMA counts 3,697 residential structures in Hamilton County overall, 5 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Hamilton County's numbers. See the data quality guide for why Hamilton County, like hundreds of other counties, doesn't get a clean compliance percentage.