Is Polk County, FL in a flood zone?
FEMA's National Risk Index puts Polk County's flood hazard at the 94.6th percentile nationally — well above the national norm for flood hazard — driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about 1.4 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
36.8% of the homes FEMA requires to carry flood insurance in Polk County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 3,935 policies against 10,707 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Across all residential structures in Polk County, not just the ones FEMA mandates, 2.6% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Polk County against the rest of the country
Polk County sits at rank 184 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 74 of 3144 by population (1 is biggest). About 852,878 people live in Polk County, Florida, spread over 1,798.466 square miles.
Your street may differ from Polk County's average
FEMA counts 272,548 residential structures in Polk County overall, 7,144 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 Polk 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.