Charlestown is a town in Sullivan County, New Hampshire, home to about 4,889 people across 36 square miles. Its ZIP code is 03603.
Homes sold for a median of $173 per square foot in the three months ending August 2026, a balanced market.
Mostly Charlestown; also Unity
Each card is that ZIP code’s whole market, including any part outside Charlestown. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Charlestown’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Albany International Airport (ALB)79 miles away |
|---|---|
| Closer regional airport | Lebanon Municipal Airport (LEB)26 miles away |
| Nearest city of 250,000+ | Boston, MA95 miles away |
| Nearest city of 1 million+ | New York, NY196 miles away |
Straight-line distances from the center of Charlestown; 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.
Charlestown had 4,806 residents in the 2020 census, up 1% since 2000.
It’s the 77th 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 83°F in summer, and winter lows average 9°F. About 43.9 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, N Springfield Lake, VT weather station (8 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).
18 doctors and other health care providers list an office in Charlestown.
Nearest hospitals
Providers with an office here
| Primary care doctors | 4 |
|---|---|
| Dentists | 2 |
| Nurse practitioners and physician assistants | 2 |
| Mental health providers | 3 |
| Physical and occupational therapists | 5 |
| Chiropractors | 2 |
| Pharmacies | 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 (5 nearby)
Grocery stores (1 nearby)
Libraries (1 nearby)
Museums (2 nearby)
Counts are within about 4 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 1783.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Fall Mountain Regional School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Charlestown Primary SchoolCharlestown | Pre-K–4 | 234 | Public | 2.1 mi |
| Charlestown Middle SchoolCharlestown | 5–8 | 168 | Public | 1.9 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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Shares ZIP codes with Unity.
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.