Based on NOAA Storm Events Database records from 1996 to 2025, these are the Delaware counties with the most recorded flood events. Sussex County tops the list with 292 events. The data includes river floods, flash floods, coastal flooding, and hurricane-related flooding.
| Rank | County | Total Events | River Floods | Flash Floods |
|---|---|---|---|---|
| 1 | Sussex County | 292 | 51 | 68 |
| 2 | New Castle County | 290 | 96 | 156 |
| 3 | Kent County | 95 | 20 | 30 |
Source: NOAA Storm Events Database (1996–2025).
Free instant lookup using official FEMA data