Maryland landslide risk
Allegany County has the highest landslide risk in Maryland, scoring 93.2 out of 100 — rated "Relatively Moderate" by FEMA's National Risk Index.
| # | County | NRI score | Rating |
NOAA events 2016–2026 |
|---|---|---|---|---|
| 1 | Allegany County | 93.2 | Relatively Moderate | 0 |
| 2 | Prince George's County | 91.1 | Relatively Moderate | 0 |
| 3 | Washington County | 79.5 | Relatively Low | 0 |
| 4 | Anne Arundel County | 79.1 | Relatively Low | 0 |
| 5 | Garrett County | 77.3 | Relatively Low | 0 |
| 6 | Montgomery County | 75.1 | Relatively Low | 0 |
| 7 | Baltimore County | 74.1 | Relatively Low | 0 |
| 8 | Calvert County | 69.2 | Relatively Low | 0 |
| 9 | Frederick County | 66.8 | Relatively Low | 0 |
| 10 | Charles County | 61.3 | Very Low | 0 |
| 11 | Carroll County | 60.9 | Very Low | 0 |
| 12 | Cecil County | 57.8 | Very Low | 0 |
| 13 | Howard County | 52.1 | Very Low | 0 |
| 14 | St. Mary's County | 51.4 | Very Low | 0 |
| 15 | Harford County | 49.9 | Very Low | 0 |
| 16 | Baltimore | 35.6 | Very Low | 0 |
| 17 | Wicomico County | 24.2 | Very Low | 0 |
| 18 | Kent County | 21.7 | Very Low | 0 |
| 19 | Queen Anne's County | 19.8 | Very Low | 0 |
| 20 | Talbot County | 16.8 | Very Low | 0 |
| 21 | Caroline County | 15.8 | Very Low | 0 |
| 22 | Worcester County | 15.7 | Very Low | 0 |
| 23 | Dorchester County | 10.7 | Very Low | 0 |
| 24 | Somerset County | 5.5 | 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 Maryland:
Frequently asked questions
What is the highest landslide risk county in Maryland?
Allegany County, MD has the highest landslide risk in Maryland, with a FEMA National Risk Index score of 93.2 out of 100 (rated "Relatively Moderate").
What causes landslide risk in Maryland?
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.