De Witt County, IL: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, De Witt County scores at the 30.3th 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 1 years. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Who actually carries the flood insurance FEMA requires
16.1% of the homes FEMA requires to carry flood insurance in De Witt County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 20 policies against 124 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Looking beyond the mandated zone, 0.4% of all residential structures in De Witt County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where De Witt County ranks
Among the 3144 US counties FEMA scores for flood hazard, De Witt County ranks 2248 — 1 being the highest hazard nationally — and 2071 by population among all 3144 counties covered here, where 1 is the largest. De Witt County, Illinois covers 397.561 square miles and counts roughly 15,319 residents.
Checking a specific address in De Witt County
23 of De Witt County's 6,622 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where De Witt 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.