Based on NOAA Storm Events Database records from 1996 to 2025, these are the New Jersey counties with the most recorded flood events. Bergen County tops the list with 380 events. The data includes river floods, flash floods, coastal flooding, and hurricane-related flooding.
| Rank | County | Total Events | River Floods | Flash Floods |
|---|---|---|---|---|
| 1 | Bergen County | 380 | 107 | 269 |
| 2 | Monmouth County | 370 | 57 | 91 |
| 3 | Ocean County | 313 | 49 | 74 |
| 4 | Cape May County | 301 | 63 | 23 |
| 5 | Atlantic County | 253 | 39 | 40 |
| 6 | Burlington County | 231 | 43 | 87 |
| 7 | Somerset County | 224 | 133 | 88 |
| 8 | Middlesex County | 214 | 34 | 120 |
| 9 | Camden County | 213 | 54 | 92 |
| 10 | Union County | 189 | 45 | 140 |
| 11 | Passaic County | 189 | 44 | 135 |
| 12 | Essex County | 168 | 28 | 135 |
| 13 | Gloucester County | 166 | 29 | 74 |
| 14 | Hudson County | 161 | 26 | 114 |
| 15 | Morris County | 151 | 85 | 63 |
| 16 | Mercer County | 139 | 51 | 74 |
| 17 | Hunterdon County | 125 | 50 | 72 |
| 18 | Cumberland County | 106 | 31 | 31 |
| 19 | Salem County | 103 | 19 | 30 |
| 20 | Warren County | 80 | 22 | 56 |
| 21 | Sussex County | 56 | 23 | 30 |
Source: NOAA Storm Events Database (1996–2025).
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