Most disaster-prone counties in New Hampshire
New Hampshire has 319 county-level FEMA disaster declarations across 10 counties. The dominant hazard type is severe storm. Grafton County leads with 40 declarations, followed by Carroll County and Rockingham County.
This ranking shows every county in New Hampshire ordered by how many times FEMA has issued a disaster declaration affecting it. Counties near coastlines, river systems, or wildfire corridors tend to appear at the top because the same geographic exposure produces recurring events across decades.
Each county links to a full disaster history page with the complete declaration timeline, hazard type breakdown, decade trends, and whatever FEMA spending data is available. For a national view, see the most disaster-prone counties in America page.
All counties by FEMA declaration count
| # | County | Declarations | Top hazard | First year | Latest year |
|---|---|---|---|---|---|
| 1 | Grafton County | 40 | Severe Storm | 1973 | 2024 |
| 2 | Carroll County | 35 | Severe Storm | 1973 | 2024 |
| 3 | Rockingham County | 35 | Severe Storm | 1972 | 2024 |
| 4 | Cheshire County | 33 | Severe Storm | 1973 | 2023 |
| 5 | Sullivan County | 33 | Severe Storm | 1973 | 2024 |
| 6 | Hillsborough County | 31 | Severe Storm | 1973 | 2020 |
| 7 | Belknap County | 30 | Severe Storm | 1973 | 2024 |
| 8 | Merrimack County | 29 | Severe Storm | 1973 | 2020 |
| 9 | Coos County | 28 | Severe Storm | 1973 | 2024 |
| 10 | Strafford County | 25 | Severe Storm | 1973 | 2020 |