Is Cobb County, GA in a flood zone?
FEMA's National Risk Index puts Cobb County's flood hazard at the 96.1th percentile nationally — well above 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 1.3 times a year. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Mandatory flood insurance compliance in Cobb County
85% of the homes FEMA requires to carry flood insurance in Cobb County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 1,146 policies against 1,348 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Across all residential structures in Cobb County, not just the ones FEMA mandates, 1% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
How Cobb County compares nationally
Cobb County sits at rank 132 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 85 of 3144 by population (1 is biggest). Cobb County, Georgia is home to about 787,538 people across 339.701 square miles of land.
What to do next if you own or are buying in Cobb County
2,144 of Cobb County's 223,468 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 Cobb County's numbers. The guide to what the Special Flood Hazard Area actually means explains why the mandatory-insurance rule exists and who it applies to.