Sullivan is a town in Cheshire County, New Hampshire, home to about 687 people across 19 square miles. Its ZIP code is 03445.
Homes sold for a median of $230 per square foot in the three months ending August 2026, a buyer’s market.
Each card is that ZIP code’s whole market, including any part outside Sullivan. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Sullivan’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows Sullivan well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | Boston Logan International Airport (BOS)75 miles away |
|---|---|
| Closer regional airport | Manchester-Boston Regional Airport (MHT)39 miles away |
| Nearest city of 250,000+ | Boston, MA76 miles away |
| Nearest city of 1 million+ | New York, NY184 miles away |
Straight-line distances from the center of Sullivan; 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.
Sullivan had 658 residents in the 2020 census, down 12% since 2000.
It’s the 207th largest of 242 towns in New Hampshire by population.
Cheshire County grew from 31,321 residents in 1900 to 76,458 in 2020.
Cheshire County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 82°F in summer, and winter lows average 10°F. About 46.3 inches of rain and melted snow fall in a typical year, with about 60 inches of snow.
Source: NOAA 1991–2020 climate normals, Keene, NH weather station (7 miles away).
27,755 jobs at 2,001 businesses in Cheshire County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
1 doctors and other health care providers list an office in Sullivan.
Nearest hospitals
Providers with an office here
| Mental health providers | 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 (1 nearby)
Grocery stores
Pharmacies
Libraries (1 nearby)
Museums
Theaters and performance venues
Counts are within about 3 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.
Buying or selling around Sullivan? Tell us what you need and when. No agents advertise here yet, so we’ll keep your request for up to 30 days and send it to local agents who join. No obligation, and you choose who to work with.
Loading map…
Shares ZIP codes with Roxbury.
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.