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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

CountyGradeScore
RockinghamB22
SullivanA15
GraftonA15
CheshireA14
CarrollA14

Safest in New Hampshire

CountyGradeScore
MerrimackA12
StraffordA12
HillsboroughA12
BelknapA13
CoosA13

All 10 Counties in New Hampshire

Sorted by flood risk score, highest to lowest.

#CountyGradeScoreClaimsPayoutsDisasters
1RockinghamB2218$383,32113
2SullivanA150$013
3GraftonA154$47,95514
4CheshireA140$012
5CarrollA143$9,19312
6BelknapA131$010
7CoosA130$011
8MerrimackA120$09
9StraffordA120$08
10HillsboroughA120$09