Jackson County, MI Flood Zone & Flood Risk Data
Jackson County, MI: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Jackson County scores at the 77.1th percentile for flood hazard, rated "Relatively Moderate", a middling flood hazard by national standards. 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 3 years. That's a county-wide figure, not a per-address one, FEMA's parcel maps are a live lookup, not a bulk file.
Mandatory flood insurance compliance in Jackson County
Out of 1,701 homes FEMA counts inside Jackson County's mapped flood zone, 124 carry the flood policy federal law requires there, 7.3% compliance, short of full coverage. Looking beyond the mandated zone, 0.2% of all residential structures in Jackson County carry flood coverage voluntarily or otherwise, relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Jackson County ranks
Among the 3144 US counties FEMA scores for flood hazard, Jackson County ranks 752, 1 being the highest hazard nationally, and 437 by population among all 3144 counties covered here, where 1 is the largest. About 160,233 people live in Jackson County, Michigan, spread over 701.905 square miles.
Checking a specific address in Jackson County
149 of Jackson County's 63,486 residential structures carry flood coverage of some kind, per FEMA's latest count, useful context, not a substitute for checking one parcel.
Where Jackson 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.