Maries County, MO flood risk explained
Flood hazard in Maries County sits at the 28.9th national percentile, 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 2.4 times a year. That's a county-wide figure, not a per-address one — FEMA's parcel maps are a live lookup, not a bulk file.
Maries County's flood-insurance compliance gap
FEMA hasn't published a residential structure count for Maries 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, 0.2% of all residential structures in Maries County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Maries County compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Maries County ranks 2288 — 1 being the highest hazard nationally — and 2537 by population among all 3144 counties covered here, where 1 is the largest. About 8,506 people live in Maries County, Missouri, spread over 526.981 square miles.
Checking a specific address in Maries County
Across all of Maries County's 5,764 residential structures, 12 carry an NFIP policy today — a county-wide count that still can't tell you one address's own mapped zone.
Where Maries County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Maries 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.