Bennett County, SD: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Bennett County scores at the 4.3th percentile for flood hazard, rated "Very Low" — among the lowest flood hazard in the country. The hazard here is driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about once every 2 years. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Bennett County's flood-insurance compliance gap
FEMA hasn't published a residential structure count for Bennett County's mapped flood zone, so a reliable mandatory-compliance percentage can't be computed here — see the data quality guide for why this gap exists for roughly a quarter of US counties. Looking beyond the mandated zone, 0% of all residential structures in Bennett County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Bennett County compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Bennett County ranks 3014 — 1 being the highest hazard nationally — and 2938 by population among all 3144 counties covered here, where 1 is the largest. Bennett County, South Dakota is home to about 3,289 people across 1,184.642 square miles of land.
Your street may differ from Bennett County's average
Across all of Bennett County's 1,083 residential structures, 0 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Bennett County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Bennett County's compliance figure is one of the ones affected by FEMA's incomplete denominator data — the data quality guide explains what that means and how many counties it touches.