Grantham is a town in Sullivan County, New Hampshire, home to about 3,465 people across 27 square miles. Its ZIP code is 03753.
Homes sold for a median of $251 per square foot in the three months ending August 2026, a balanced market.
Each card is that ZIP code’s whole market, including any part outside Grantham. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Grantham’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Portland International Jetport (PWM)92 miles away |
|---|---|
| Closer regional airport | Lebanon Municipal Airport (LEB)12 miles away |
| Nearest city of 250,000+ | Boston, MA99 miles away |
| Nearest city of 1 million+ | New York, NY217 miles away |
Straight-line distances from the center of Grantham; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
Grantham had 3,404 residents in the 2020 census, up 57% since 2000.
It’s the 104th largest of 242 towns in New Hampshire by population.
Sullivan County grew from 18,009 residents in 1900 to 43,063 in 2020.
Sullivan County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 80°F in summer, and winter lows average 9°F. About 42 inches of rain and melted snow fall in a typical year, with about 66 inches of snow.
Source: NOAA 1991–2020 climate normals, Newport, NH weather station (9 miles away).
12,071 jobs at 956 businesses in Sullivan County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
14 doctors and other health care providers list an office in Grantham.
Nearest hospitals
Providers with an office here
| Specialist doctors | 3 |
|---|---|
| Nurse practitioners and physician assistants | 3 |
| Mental health providers | 3 |
| Physical and occupational therapists | 4 |
| Chiropractors | 1 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (3 nearby)
Libraries (1 nearby)
Theaters and performance venues
Counts are within about 3.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Established in 1761.
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Grantham School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Grantham Village SchoolGrantham | Pre-K–6 | 258 | Public | 1.2 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.