Dallas County, TX flood risk explained
Flood hazard in Dallas County sits at the 99.6th national percentile, among the highest 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 4.6 times a year. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Mandatory flood insurance compliance in Dallas County
39.7% of the homes FEMA requires to carry flood insurance in Dallas County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 2,482 policies against 6,257 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Looking beyond the mandated zone, 0.8% of all residential structures in Dallas County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Dallas County compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Dallas County ranks 15 — 1 being the highest hazard nationally — and 8 by population among all 3144 counties covered here, where 1 is the largest. Dallas County, Texas is home to about 2,656,028 people across 873.188 square miles of land.
Checking a specific address in Dallas County
4,809 of Dallas County's 615,751 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Dallas 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.