How much flood risk does Robertson County actually carry?
Robertson County lands at the 53.1th percentile of FEMA's National Risk Index for flooding, "Relatively Low" territory — below the national norm for flood hazard — with the 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.
Robertson County's flood-insurance compliance gap
Homes with a federally backed mortgage inside Robertson County's mapped high-risk flood zone (the Special Flood Hazard Area, or SFHA) are legally required to carry an NFIP flood policy. In practice, 17.8% of them do — 23 active policies against 129 structures FEMA counts in that zone, leaving a real compliance gap. Across all residential structures in Robertson County, not just the ones FEMA mandates, 0.2% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
How Robertson County compares nationally
Robertson County sits at rank 1535 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 735 of 3144 by population (1 is biggest). About 78,459 people live in Robertson County, Tennessee, spread over 476.336 square miles.
What to do next if you own or are buying in Robertson County
FEMA counts 28,038 residential structures in Robertson County overall, 52 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 Robertson 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.