Merrimack, NH
Merrimack County in New Hampshire has 9 FEMA disaster declarations on record covering 1973–2012, most recently Hurricane Sandy on Oct 30, 2012 (DR-3360). Its flood risk grade is A (Low risk), ranking #1240 of 3,277 U.S. counties, with 3 NFIP flood insurance claims totaling $4,234 in payouts. Flood risk is relatively low compared to the national average.
FEMA Disaster Declarations in Merrimack County
The 9 most recent federally declared disasters affecting Merrimack County, NH (1973–2012). Total declarations on record: 9.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| Oct 30, 2012 | Hurricane | Hurricane Sandy | DR-3360 |
| Sep 3, 2011 | Hurricane | Tropical Storm Irene | DR-4026 |
| Aug 27, 2011 | Hurricane | Hurricane Irene | DR-3333 |
| Sep 19, 2005 | Hurricane | Hurricane Katrina Evacuation | DR-3258 |
| Oct 29, 1996 | Flood | Fall Northeaster Rainstorm | DR-1144 |
| Jan 3, 1996 | Flood | Excessive Rainfall, High Winds, and Flooding | DR-1077 |
| Aug 29, 1990 | Flood | Severe Storms & Flooding | DR-876 |
| Apr 16, 1987 | Flood | Severe Storms & Flooding | DR-789 |
| Jul 11, 1973 | Flood | Severe Storms & Flooding | DR-399 |
Score Breakdown
The composite score of 12 is calculated from four weighted factors. See our methodology for details.
Other Counties in New Hampshire
| County | Grade | Score | Claims | Disasters |
|---|---|---|---|---|
| Strafford | A | 12 | 2 | 8 |
| Belknap | A | 13 | 0 | 10 |
| Coos | A | 13 | 6 | 11 |
| Rockingham | A | 11 | 80 | 13 |
| Carroll | A | 14 | 9 | 12 |
| Sullivan | A | 15 | 4 | 13 |
More Counties in New Hampshire
Frequently Asked Questions
How many FEMA disaster declarations does Merrimack County, NH have?
Merrimack County, NH has 9 federal disaster declarations on FEMA record (1973–2012). The 5 most recent are: Hurricane Sandy (declared Oct 30, 2012, DR-3360); Tropical Storm Irene (declared Sep 3, 2011, DR-4026); Hurricane Irene (declared Aug 27, 2011, DR-3333); Hurricane Katrina Evacuation (declared Sep 19, 2005, DR-3258); Fall Northeaster Rainstorm (declared Oct 29, 1996, DR-1144). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for Merrimack County, NH?
Merrimack County is graded A (composite score 12/100, low risk). It ranks #1240 of 3,277 U.S. counties for flood risk in our scoring model. The grade combines NFIP claims density (40%), disaster frequency (25%), claim severity (20%), and year-over-year trend (15%).
How many NFIP flood insurance claims have been filed in Merrimack County?
3 NFIP flood insurance claims have been filed in Merrimack County, NH, totaling $4,234 in payouts. The average claim is $1,411. Source: FEMA FimaNfipClaims v2 dataset.
Has Merrimack County, NH had any recent flood disasters?
Yes. The most recent FEMA declaration affecting Merrimack County was Hurricane Sandy on Oct 30, 2012 (DR-3360). The county has 9 declared disasters in the OpenFEMA record covering 1973–2012.
The this entity record above pulls directly from FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims. What follows is the per-entity context — how this entity sits in the broader U.S. flood risk, NFIP claims, and disaster declarations distribution and which underlying factors drive the headline numbers.
The methodology behind every numeric value on this page is publicly documented on the FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for this entity’s peers within U.S. ZIPs, counties, and states. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Source: FEMA OpenFEMA datasets, 2026.