Is Johnson County, AR in a flood zone?
FEMA's National Risk Index puts Johnson County's flood hazard at the 62th percentile nationally — below 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 1.6 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
11.6% of the homes FEMA requires to carry flood insurance in Johnson County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 41 policies against 355 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Across all residential structures in Johnson County, not just the ones FEMA mandates, 0.4% carry an NFIP policy — most flood damage nationally happens outside the mapped high-risk zone, so that broader number matters too.
How Johnson County compares nationally
Johnson County sits at rank 1248 of 3144 counties on FEMA's flood hazard scale (1 is worst) and rank 1568 of 3144 by population (1 is biggest). About 26,172 people live in Johnson County, Arkansas, spread over 660.99 square miles.
Your street may differ from Johnson County's average
Across all of Johnson County's 10,685 residential structures, 46 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
More on how this number was built
The methodology guide shows exactly which FEMA and Census tables feed Johnson 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.