New Hampshire Disaster Risk
Natural disaster risk data for all 10 counties.
Avg FEMA Rating
Relatively Low
Avg Percentile
70th
Counties with Data
10
of 10 total
Highest Risk Counties
All New Hampshire Counties
| County | Percentile |
|---|---|
| Hillsborough County | 90th |
| Rockingham County | 86th |
| Grafton County | 82th |
| Merrimack County | 78th |
| Coos County | 73th |
| Carroll County | 71th |
| Strafford County | 64th |
| Cheshire County | 60th |
| Belknap County | 57th |
| Sullivan County | 38th |
Frequently Asked Questions
Which county in New Hampshire has the highest natural disaster risk?
Hillsborough County has the highest natural disaster risk in New Hampshire, rated Relatively Moderate (90th percentile nationally), based on FEMA National Risk Index data.
Which county in New Hampshire is the safest from natural disasters?
Sullivan County has the lowest natural disaster risk in New Hampshire, rated Very Low (38th percentile nationally), based on FEMA NRI data.
What natural disasters are most common in New Hampshire?
New Hampshire counties face varying levels of risk from floods, wildfires, tornadoes, earthquakes, and hurricanes. The FEMA National Risk Index scores each county across 18 hazard types. See individual county pages for detailed hazard breakdowns.
How is natural disaster risk measured by county?
The FEMA National Risk Index (NRI) measures natural disaster risk using expected annual loss, social vulnerability, and community resilience. Scores are normalized nationally, with ratings from Very Low to Very High across 18 natural hazard types.
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Data Source
Risk data sourced from the FEMA National Risk Index (NRI). Risk scores are relative rankings (0–100) across all US counties — not absolute risk measures. Higher scores indicate higher relative risk compared to other counties.
Disclaimer: This data is informational only. It is not financial, insurance, or legal advice. Always consult a qualified professional before making insurance or real estate decisions.