New Hampshire Flood Zones
New Hampshire faces riverine flooding from spring snowmelt and heavy rainfall, particularly along the Merrimack, Connecticut, and Pemigewasset rivers. Mountain stream flash flooding and ice jams are also significant hazards, especially in the White Mountains region.
5 communities participate in FEMA's Community Rating System, qualifying residents for flood insurance discounts of up to 10%.
FEMA Region
Region 1
Also covers Connecticut, Maine, Massachusetts, +2 more
NFIP Policies
5,500
New Hampshire Flood Risk Overview
County-level risk ratings from FEMA's National Risk Index across 10 New Hampshire counties.
Inland Flood Risk
0 of 10 counties rated high or very high
Coastal Flood Risk
1 of 2 coastal counties rated high or very high
Hurricane Risk
0 of 10 counties rated high or very high
Source: FEMA National Risk Index, county-level assessment.
Federal Flood Disaster History
New Hampshire has received 22 federal disaster declarations for flooding, hurricanes, severe storms, and coastal storms.
2020s
2
2010s
6
2000s
1
1990s
6
1980s
2
1970s
5
Recent Declarations
Showing 8 most recent of 22 total declarations.
Source: OpenFEMA Disaster Declarations Summaries API. Data sourced February 2026.
NFIP Flood Insurance Claims
New Hampshire properties have filed 4,421 NFIP flood insurance claims totaling $65.6M in payouts since 1978. The average claim payout is $15K.
Claims by Decade
2020s
493
2010s
689
2000s
1,466
1990s
808
1980s
630
1970s
335
Highest-Claim Years
Claims by Flood Zone
Zone AE
1,249
Zone A
1,191
Zone X
1,114
Zone AO
168
Zone VE
65
Zone AOB
28
Zone V
26
Source: OpenFEMA NFIP Claims API. Data sourced February 2026.
Flood Insurance Discounts in New Hampshire
5 New Hampshire communities participate in FEMA's Community Rating System (CRS), earning flood insurance premium discounts for residents in Special Flood Hazard Areas. CRS classes in New Hampshire range from 8 to 9, with discounts from 5% to 10%.
Class 8 - 10% discount
Marlborough
Class 8 - 10% discount
Class 8 - 10% discount
Peterborough
Class 8 - 10% discount
Winchester
Class 9 - 5% discount
Source: FEMA Community Rating System, October 2025. Discounts apply to NFIP policies only.
Look Up Any New Hampshire Address
Enter a NH address to instantly check its FEMA flood zone designation, SFHA status, and insurance requirements.
Free Flood Zone LookupNew Hampshire Cities
Explore flood zone information for major cities in New Hampshire.
New Hampshire Flood Zone FAQ
How do I check if my New Hampshire property is in a flood zone?
Enter your NH address in FludZone's free lookup tool. We query FEMA's National Flood Hazard Layer in real-time to show your flood zone designation, whether flood insurance is required, and your property's risk level.
Do I need flood insurance in New Hampshire?
If your New Hampshire property is in a Special Flood Hazard Area (SFHA), meaning zones starting with A or V, and you have a federally regulated or government-backed mortgage, federal law generally requires your lender to ensure you carry flood insurance. Properties in Zone X are not subject to the federal mandate but lenders may still require coverage, and it is often recommended given New Hampshire's flood history.
What are the most common flood zones in New Hampshire?
The most common FEMA flood zone designations in New Hampshire are Zone AE, Zone A, Zone X. Each zone reflects a different level of flood risk, from high-risk areas where flood insurance is generally required for federally regulated or government-backed mortgages to lower-risk areas where coverage is optional but recommended.
Can I remove my New Hampshire property from a flood zone?
Yes, if your New Hampshire property's natural ground elevation was always above the Base Flood Elevation and FEMA inadvertently mapped it in the SFHA, you can apply for a Letter of Map Amendment (LOMA) through FEMA. For properties in New Hampshire's AE and A zones, the LOMA process is relatively straightforward when the elevation data supports it. If your property was raised above the BFE with fill, the process is a LOMR-F. A successful LOMA generally removes the federal mandatory flood insurance requirement, but your lender may still choose to require coverage. You'll need an elevation certificate from a licensed surveyor.
Do any New Hampshire communities offer flood insurance discounts?
Yes, 5 New Hampshire communities participate in FEMA's Community Rating System (CRS), a voluntary program that rewards communities for exceeding minimum flood mitigation standards. Residents in participating communities can receive NFIP premium discounts of up to 10% in the Special Flood Hazard Area. Properties outside the SFHA also benefit: CRS classes 1 through 6 receive a 10% discount, and classes 7 through 9 receive a 5% discount on NFIP premiums. Check your city's page on FludZone to see if your community participates.
Sources
This page summarizes information from FEMA and other official resources in plain language. For full technical details, see the links below.
- FEMA National Flood Hazard LayerDirect Source
The NFHL is the source of all flood zone data shown on this page.
- FEMA Map Service Center — Search by AddressDirect Source
Look up any address to view FIRM panels, FIS reports, and LOMCs.
- NFHL Data and Map StatusTopic Page
View NFHL coverage and data freshness by state and community.
- FEMA National Risk Index — Data ResourcesDirect Source
County-level risk scores for inland flooding, coastal flooding, and hurricane used in the Flood Risk Profile.
- OpenFEMA Disaster Declarations Summaries API v2Direct Source
Federal disaster declarations filtered for flood-related incident types (Flood, Hurricane, Severe Storm, Coastal Storm).
- OpenFEMA FIMA NFIP Claims API v2Direct Source
Historical NFIP flood insurance claims since 1978, aggregated by county and state. Includes claim counts, payouts, and flood zone breakdowns.
Sources last verified: February 2026
Understanding Flood Zones
Learn more about the FEMA flood zone designations common in New Hampshire.