Is Harrison County, MO in a flood zone?
FEMA's National Risk Index puts Harrison County's flood hazard at the 28.1th percentile nationally — among the lowest flood hazard in the country — driven by inland rivers and flash flooding rather than the coast — FEMA's model puts a flood event here at about once every 2 years. County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Mandatory flood insurance compliance in Harrison County
Harrison County is one of the counties where FEMA's own denominator for mandated flood-zone structures is missing, so no compliance rate is shown rather than a guessed one — the data quality guide covers how common this is. Across all residential structures in Harrison County, not just the ones FEMA mandates, 0% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
Harrison County against the rest of the country
Harrison County sits at rank 2312 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 2560 of 3144 by population (1 is biggest). About 8,186 people live in Harrison County, Missouri, spread over 722.517 square miles.
Your street may differ from Harrison County's average
FEMA counts 5,752 residential structures in Harrison County overall, 2 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 Harrison County's numbers. See the data quality guide for why Harrison County, like hundreds of other counties, doesn't get a clean compliance percentage.