Mackinac County, MI: flood risk, in FEMA's own numbers
On FEMA's National Risk Index, Mackinac County scores at the 36.8th percentile for flood hazard, rated "Very Low" — among the lowest flood hazard in the country. The hazard here is split between inland river flooding (about once every 6 years) and coastal storm surge (about once every 76 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
FEMA hasn't published a residential structure count for Mackinac 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, 0.4% of all residential structures in Mackinac County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Mackinac County against the rest of the country
Among the 3144 US counties FEMA scores for flood hazard, Mackinac County ranks 2052 — 1 being the highest hazard nationally — and 2333 by population among all 3144 counties covered here, where 1 is the largest. Mackinac County, Michigan covers 1,021.879 square miles and counts roughly 11,144 residents.
Your street may differ from Mackinac County's average
38 of Mackinac County's 9,485 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Mackinac County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Mackinac 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.