Walthall County, MS flood risk explained
Flood hazard in Walthall County sits at the 26.3th 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 once every 4 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 Walthall County
Out of 279 homes FEMA counts inside Walthall County's mapped flood zone, 33 carry the flood policy federal law requires there — 11.8% compliance, short of full coverage. Looking beyond the mandated zone, 0.6% of all residential structures in Walthall County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
How Walthall County compares nationally
Among the 3144 US counties FEMA scores for flood hazard, Walthall County ranks 2364 — 1 being the highest hazard nationally — and 2170 by population among all 3144 counties covered here, where 1 is the largest. Walthall County, Mississippi covers 403.928 square miles and counts roughly 13,839 residents.
Checking a specific address in Walthall County
FEMA counts 6,734 residential structures in Walthall County overall, 42 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
Where Walthall County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. If you're unsure why any of this insurance requirement exists at all, the SFHA explainer covers it from first principles.