Ellis County, KS flood risk explained
Flood hazard in Ellis County sits at the 34.4th 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 1.4 times a year. This describes the county, not any one street — FEMA only publishes exact parcel zones through a live map service.
Who actually carries the flood insurance FEMA requires
FEMA hasn't published a residential structure count for Ellis 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, 0.9% of all residential structures in Ellis County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Ellis County ranks
Among the 3144 US counties FEMA scores for flood hazard, Ellis County ranks 2123 — 1 being the highest hazard nationally — and 1471 by population among all 3144 counties covered here, where 1 is the largest. About 29,007 people live in Ellis County, Kansas, spread over 899.934 square miles.
Checking a specific address in Ellis County
FEMA counts 12,192 residential structures in Ellis County overall, 107 of them carrying some form of NFIP coverage — but a lender or insurer cares about one parcel, not that county total.
Where Ellis County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Ellis 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.