Northumberland is a town in Coos County, New Hampshire, home to about 1,815 people across 36 square miles. Its ZIP code is 03582, and parts of 03584 are in Northumberland too.
Homes sold for a median of $164 per square foot in the three months ending August 2026, a seller’s market.
Mostly Northumberland; also Stark
Mostly Lancaster; part is in Northumberland
Each card is that ZIP code’s whole market, including any part outside Northumberland. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Northumberland’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows Northumberland well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | Portland International Jetport (PWM)87 miles away |
|---|---|
| Closer regional airport | Lebanon Municipal Airport (LEB)75 miles away |
| Nearest city of 250,000+ | Boston, MA156 miles away |
| Nearest city of 1 million+ | New York, NY296 miles away |
Straight-line distances from the center of Northumberland; 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.
Northumberland had 2,126 residents in the 2020 census, down 13% since 2000.
It’s the 149th largest of 242 towns in New Hampshire by population.
Coos County grew from 29,468 residents in 1900 to 31,268 in 2020.
Coos 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 3°F. About 39.9 inches of rain and melted snow fall in a typical year, with about 76 inches of snow.
Source: NOAA 1991–2020 climate normals, Lancaster, NH weather station (5 miles away).
8,380 jobs at 809 businesses in Coos County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
7 doctors and other health care providers list an office in Northumberland.
Nearest hospitals
Providers with an office here
| Primary care doctors | 2 |
|---|---|
| Nurse practitioners and physician assistants | 2 |
| Mental health providers | 2 |
| Physical and occupational therapists | 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 (2 nearby)
Grocery stores (1 nearby)
Pharmacies
Libraries (2 nearby)
Museums
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.
Public schools here are run by Northumberland School District, Stark School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Groveton Elementary SchoolGroveton | K–5 | 116 | Public | 2.5 mi |
| Stark Village SchoolStark | K–6 | 32 | Public | 6.3 mi |
| Groveton High School (Middle)Groveton | 6–8 | 79 | Public | 2.6 mi |
| Groveton High SchoolGroveton | 9–12 | 121 | Public | 2.6 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.
Buying or selling around Northumberland? 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 Lancaster and Stark.
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.