Franklin County, IA Flood Zone & Flood Risk Data
Franklin County, IA: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Franklin County scores at the 14th 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 1.5 times a year. 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
Out of 44 homes FEMA counts inside Franklin County's mapped flood zone, 5 carry the flood policy federal law requires there, 11.4% compliance, short of full coverage. Looking beyond the mandated zone, 0.2% of all residential structures in Franklin County carry flood coverage voluntarily or otherwise, relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Franklin County ranks
Among the 3144 US counties FEMA scores for flood hazard, Franklin County ranks 2734, 1 being the highest hazard nationally, and 2406 by population among all 3144 counties covered here, where 1 is the largest. Franklin County, Iowa is home to about 10,024 people across 581.972 square miles of land.
Checking a specific address in Franklin County
8 of Franklin County's 4,727 residential structures carry flood coverage of some kind, per FEMA's latest count, useful context, not a substitute for checking one parcel.
Where Franklin 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.