Charles County, MD flood risk explained
Flood hazard in Charles County sits at the 52.4th national percentile, below the national norm for flood hazard; split between inland river flooding (about 1.7 times a year) and coastal storm surge (about 3.7 times a year). County-wide, not parcel-specific: FEMA's real flood-zone map is queried live, never shipped as a download.
Mandatory flood insurance compliance in Charles County
45.4% of the homes FEMA requires to carry flood insurance in Charles County — those inside the mapped Special Flood Hazard Area — actually have a policy in force: 158 policies against 348 mandated structures, which means a meaningful share of legally-required coverage simply isn't there. Looking beyond the mandated zone, 0.9% of all residential structures in Charles County carry flood coverage voluntarily or otherwise — relevant because most NFIP claims nationally come from outside the mapped SFHA.
Where Charles County ranks
Among the 3144 US counties FEMA scores for flood hazard, Charles County ranks 1557 — 1 being the highest hazard nationally — and 400 by population among all 3144 counties covered here, where 1 is the largest. About 174,478 people live in Charles County, Maryland, spread over 457.819 square miles.
Checking a specific address in Charles County
547 of Charles County's 58,526 residential structures carry flood coverage of some kind, per FEMA's latest count — useful context, not a substitute for checking one parcel.
Where Charles County's figures come from
Every figure on this page traces to a named FEMA dataset, documented in the methodology guide. Charles County's coastal exposure is covered in the coastal vs. inland flood risk guide, including how storm surge risk differs from river flooding.