The Town FilesGrantham, New Hampshire
Town in Sullivan County · population 3,404 (2020 Census)
- Median home
- $343,100
- Household income
- $106,403
- Jan low / Jul high
- 9° / 80°
- Snow a year
- 70 in
- Tornadoes ≤10 mi since 1950
- 4
- Median age
- 50.4
Grantham is a town of 3,404 people in Sullivan County, New Hampshire. The median home is worth $343,100, close to the typical New Hampshire town ($357,650). It ranks better for a vacation home than 98% of New Hampshire towns, better for families than 91% of New Hampshire towns, easier by car than 87% of New Hampshire towns.
How Grantham ranks
Percentile among New Hampshire towns with at least 500 people on The Town Files lifestyle rankings. 50 is typical for the state; 90 means better than 90% of New Hampshire towns.
Homes and cost of living
The median home in Grantham is worth $343,100, close to the typical New Hampshire town ($357,650). Homes cost about 3.2 times the median household income of $106,403, which is more affordable than 83% of New Hampshire towns. 100.0% of households own their home.
| Housing | Grantham | Typical New Hampshire town |
|---|---|---|
| Median home value | $343,100 | $357,650 |
| Median rent | — | $1,285 |
| Median household income | $106,403 | $94,107 |
| Home value ÷ income | 3.2× | 3.8× |
| Homeownership | 100.0% | 82.1% |
| Median year built | 1987 | 1978 |
| Seasonal / vacation homes | 35.5% | — |
Who lives in Grantham
| People | Grantham | Typical New Hampshire town |
|---|---|---|
| Median age | 50.4 | 46.3 |
| Age 65 and over | 17.0% | 22.3% |
| Under 18 | 19.1% | — |
| Bachelor's degree or higher | 59.6% | 36.8% |
| Below the poverty line | 0.0% | 7.2% |
| Veterans | 11.3% | — |
| Born outside the U.S. | 2.2% | — |
| Work from home | 13.8% | 14.2% |
| Average commute | 22.5 min | 27.1 min |
| Homes with broadband | 94.6% | 92.5% |
Weather in Grantham
July highs average 80.1°F and January lows 9.1°F. About 42.0 inches of rain and melted snow fall a year, with 69.9 inches of snow (typical New Hampshire town: 67.7 in). Expect about 6 days a year at 90°F or hotter and 186 nights at or below freezing.
Tornadoes, storms and disasters
4 tornadoes have passed within 10 miles of Grantham since 1950, compared with 5 for the typical New Hampshire town. The strongest, an EF1, struck on August 21, 2011 about 9.3 miles from the town center. The most recent was on August 21, 2011.
Hail of 1 inch or larger has been reported within 10 miles 9 times; the largest was 1.50 inches on June 26, 2026.
Severe weather in Sullivan County since 1996
Sullivan County has been included in 33 federal disaster or emergency declarations since 1953, most often for flood, hurricane, snowstorm.
| Declared | Incident | Declaration |
|---|---|---|
| July 10, 2024 | Winter Storm | DR-4799: Severe Winter Storm And Flooding |
| September 14, 2023 | Flood | DR-4740: Severe Storms And Flooding |
| October 4, 2021 | Flood | DR-4624: Severe Storm And Flooding |
| April 3, 2020 | Biological | DR-4516: Covid-19 Pandemic |
| March 13, 2020 | Biological | EM-3445: Covid-19 |
Jobs and pay in Sullivan County
Sullivan County had 13,867 jobs in 2024, paying an average of $58,062 a year. Unemployment was 1.9% in 2023; in Grantham itself the ACS puts it at 2.8%.
Public schools in Grantham
1 public school with 271 students, about 13.6 students per teacher.
| School | Grades | Students | Per teacher |
|---|---|---|---|
| Grantham Village School | PK-6 | 271 | 13.6 |
Towns near Grantham
- Enfield, NH6.2 mi · 4,465 people · home $390,800
- Sunapee, NH9.2 mi · 3,342 people · home $393,000
- Lebanon, NH9.7 mi · 14,282 people · home $385,400
- Newport, NH10.4 mi · 6,299 people · home $225,900
- New London, NH10.5 mi · 4,400 people · home $554,100
- Newport, NH10.6 mi · 4,735 people · home $211,200
- White River Junction, VT12.9 mi · 2,532 people · home $278,800
- Claremont, NH12.9 mi · 12,949 people · home $204,600
Grantham questions
Is Grantham, New Hampshire a good place to retire?
On The Town Files lifestyle rankings, Grantham scores better for retirees than 83% of New Hampshire towns and quieter than 59%. 17.0% of residents are 65 or older (median age 50.4).
How much does a house cost in Grantham?
The median owner-occupied home in Grantham is valued at $343,100 (Census ACS 2020–2024), against a median household income of $106,403, so homes cost about 3.2 times income. Median rent is — a month.
What is the weather like in Grantham?
July highs average 80.1°F and January lows 9.1°F (NOAA 1991–2020 normals). It gets about 42.0 inches of precipitation a year and 69.9 inches of snow.
Does Grantham get tornadoes?
4 tornadoes have passed within 10 miles of Grantham since 1950 (NOAA Storm Events); the strongest was an EF1 on August 21, 2011. The typical New Hampshire town has had 5.
- U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024)
- U.S. Census Bureau, 2020 Census and 2025 Gazetteer (2020 / 2025)
- NOAA NCEI U.S. Climate Normals (1991–2020)
- NOAA NCEI Storm Events Database (1950–2026)
- FEMA OpenFEMA Disaster Declarations (this product uses the FEMA OpenFEMA API but is not endorsed by FEMA) (1953–2026)
- NCES Common Core of Data (2023–24)
- BLS Quarterly Census of Employment and Wages; USDA ERS county unemployment (BLS LAUS) (2000–2024)
- The Town Files lifestyle rankings, built from federal demographic, school, crime and housing data (2025)