Updated April 2026
Flood Risk in New Hampshire
New Hampshire has 10 counties with flood risk data, 26 total NFIP flood insurance claims, and an average risk score of 14 out of 100.
10
Counties
26
NFIP Claims
$440,469
Total Payouts
14
Avg Risk Score
Grade Distribution
A
9
counties
B
1
counties
C
0
counties
D
0
counties
F
0
counties
Riskiest in New Hampshire
| County | Grade | Score |
|---|---|---|
| Rockingham | B | 22 |
| Sullivan | A | 15 |
| Grafton | A | 15 |
| Cheshire | A | 14 |
| Carroll | A | 14 |
Safest in New Hampshire
| County | Grade | Score |
|---|---|---|
| Merrimack | A | 12 |
| Strafford | A | 12 |
| Hillsborough | A | 12 |
| Belknap | A | 13 |
| Coos | A | 13 |
All 10 Counties in New Hampshire
Sorted by flood risk score, highest to lowest.
| # | County | Grade | Score | Claims | Payouts | Disasters |
|---|---|---|---|---|---|---|
| 1 | Rockingham | B | 22 | 18 | $383,321 | 13 |
| 2 | Sullivan | A | 15 | 0 | $0 | 13 |
| 3 | Grafton | A | 15 | 4 | $47,955 | 14 |
| 4 | Cheshire | A | 14 | 0 | $0 | 12 |
| 5 | Carroll | A | 14 | 3 | $9,193 | 12 |
| 6 | Belknap | A | 13 | 1 | $0 | 10 |
| 7 | Coos | A | 13 | 0 | $0 | 11 |
| 8 | Merrimack | A | 12 | 0 | $0 | 9 |
| 9 | Strafford | A | 12 | 0 | $0 | 8 |
| 10 | Hillsborough | A | 12 | 0 | $0 | 9 |