Davison County, SD flood risk explained
Flood hazard in Davison County sits at the 35.9th 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 3.1 times a year. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Davison County's flood-insurance compliance gap
17.5% of the homes FEMA requires to carry flood insurance in Davison County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 21 policies against 120 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Looking beyond the mandated zone, 0.5% of all residential structures in Davison County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Davison County compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Davison County ranks 2078 — 1 being the highest hazard nationally — and 1833 by population among all 3144 counties covered here, where 1 is the largest. About 19,907 people live in Davison County, South Dakota, spread over 435.633 square miles.
Checking a specific address in Davison County
FEMA counts 8,968 residential structures in Davison County overall, 44 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
Where Davison 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.