How much flood risk does Oakland County actually carry?
Oakland County lands at the 97.5th percentile of FEMA's National Risk Index for flooding, "Relatively High" territory — well above the national norm for flood hazard — with the hazard driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 1.1 times a year. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Mandatory flood insurance compliance in Oakland County
Out of 1,809 homes FEMA counts inside Oakland County's mapped flood zone, 378 carry the flood policy federal law requires there — 20.9% compliance, short of full coverage. Across all residential structures in Oakland County, not just the ones FEMA mandates, 0.3% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Where Oakland County ranks
Oakland County sits at rank 88 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 33 of 3144 by population (1 is biggest). Oakland County, Michigan is home to about 1,296,888 people across 867.426 square miles of land.
Your street may differ from Oakland County's average
FEMA counts 428,953 residential structures in Oakland County overall, 1,096 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Oakland County's numbers. The guide to what the Special Flood Hazard Area actually means explains why the mandatory-insurance rule exists and who it applies to.