Based on NOAA Storm Events Database records from 1996 to 2025, these are the Alaska counties with the most recorded flood events. Sitka City and Borough tops the list with 16 events. The data includes river floods, flash floods, coastal flooding, and hurricane-related flooding.
| Rank | County | Total Events | River Floods | Flash Floods |
|---|---|---|---|---|
| 1 | Sitka City and Borough | 16 | 15 | 1 |
| 2 | Aleutians West Census Area | 2 | 0 | 0 |
| 3 | Anchorage Municipality | 1 | 1 | 0 |
| 4 | Aleutians East Borough | 1 | 0 | 1 |
| 5 | North Slope Borough | 1 | 1 | 0 |
Source: NOAA Storm Events Database (1996–2025).
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