STATE RISK ROLL-UP

New Hampshire

Across 10 counties, FEMA rates 0 elevated or higher for overall natural-hazard risk. Here's what drives it — and where it concentrates.

How the counties rate

Low7

Moderate3

Elevated0

High0

Dominant hazards

The hazards most often rated elevated or higher across New Hampshire's counties:

Winter weather — 4 counties
Flooding — 1 county

Highest-risk counties

County	FEMA composite	Score
Hillsborough County	Relatively Moderate	90
Rockingham County	Relatively Moderate	86
Grafton County	Relatively Moderate	82
Merrimack County	Relatively Low	78
Coos County	Relatively Low	73
Carroll County	Relatively Low	71

State figures are a roll-up of FEMA National Risk Index county data (counts and rankings), not an official FEMA state rating. Risk is an estimate from a public model, not a guarantee — verify your specific insurance needs with a licensed professional. See the methodology.

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FEMA National Risk Index · as of 2026-07-08