New Jersey landslide risk
Sussex County has the highest landslide risk in New Jersey, scoring 86.5 out of 100 — rated "Relatively Low" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Sussex County | 86.5 | Relatively Low | 0 |
| 2 | Warren County | 77.4 | Relatively Low | 0 |
| 3 | Morris County | 74 | Relatively Low | 0 |
| 4 | Middlesex County | 73.3 | Relatively Low | 0 |
| 5 | Passaic County | 68.9 | Relatively Low | 0 |
| 6 | Burlington County | 61.1 | Very Low | 0 |
| 7 | Bergen County | 58.9 | Very Low | 0 |
| 8 | Ocean County | 56.5 | Very Low | 0 |
| 9 | Camden County | 55.2 | Very Low | 0 |
| 10 | Mercer County | 53.5 | Very Low | 0 |
| 11 | Essex County | 50.5 | Very Low | 0 |
| 12 | Hunterdon County | 49.4 | Very Low | 0 |
| 13 | Gloucester County | 46.8 | Very Low | 0 |
| 14 | Atlantic County | 37.8 | Very Low | 0 |
| 15 | Monmouth County | 34.4 | Very Low | 0 |
| 16 | Cumberland County | 28.2 | Very Low | 0 |
| 17 | Union County | 27.5 | Very Low | 0 |
| 18 | Hudson County | 25.3 | Very Low | 0 |
| 19 | Somerset County | 23.1 | Very Low | 0 |
| 20 | Salem County | 20.5 | Very Low | 0 |
| 21 | Cape May County | 15.6 | Very Low | 0 |
Source: FEMA National Risk Index v1.20.0, December 2025. Scores are 0–100 percentile rankings among all US counties. See the methodology page for definitions. Download the full CSV for all counties.
Landslide risk nationally:
Other hazard risks in New Jersey:
Frequently asked questions
What is the highest landslide risk county in New Jersey?
Sussex County, NJ has the highest landslide risk in New Jersey, with a FEMA National Risk Index score of 86.5 out of 100 (rated "Relatively Low").
What causes landslide risk in New Jersey?
Landslide risk covers expected losses from hillslope failures, rockfalls, and debris flows triggered by heavy rainfall, snowmelt, wildfire, or earthquakes. High scores concentrate in the Pacific Northwest, California coastal ranges, Appalachians, and Rocky Mountain foothills, where steep terrain combines with intense precipitation or seismic activity.