Waller County, TX flood risk explained
Flood hazard in Waller County sits at the 65.6th national percentile, below the national norm for flood hazard; 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. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Who actually carries the flood insurance FEMA requires
Out of 1,481 homes FEMA counts inside Waller County's mapped flood zone, 466 carry the flood policy federal law requires there — 31.5% compliance, short of full coverage. Looking beyond the mandated zone, 11% of all residential structures in Waller County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Waller County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Waller County ranks 1128 — 1 being the highest hazard nationally — and 842 by population among all 3144 counties covered here, where 1 is the largest. About 65,109 people live in Waller County, Texas, spread over 513.344 square miles.
Your street may differ from Waller County's average
Across all of Waller County's 17,566 residential structures, 1,927 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Waller County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. If you're unsure why any of this insurance requirement exists at all, the SFHA explainer covers it from first principles.