Andover is a town in Merrimack County, New Hampshire, home to about 2,135 people across 40 square miles. Its ZIP codes are 03216 and 03231.
Homes sold for a median of $194 per square foot in the three months ending August 2026, a balanced market.
All in Andover
All in Andover
Each card is that ZIP code’s whole market, including any part outside Andover. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Andover’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)75 miles away |
|---|---|
| Closer regional airport | Lebanon Municipal Airport (LEB)29 miles away |
| Nearest city of 250,000+ | Boston, MA85 miles away |
| Nearest city of 1 million+ | New York, NY221 miles away |
Straight-line distances from the center of Andover; 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.
Andover had 2,406 residents in the 2020 census, up 14% since 2000.
It’s the 137th largest of 242 towns in New Hampshire by population.
Merrimack County grew from 52,430 residents in 1900 to 153,808 in 2020.
Merrimack 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 13°F. About 48.6 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Salisbury, NH weather station (6 miles away).
62,841 jobs at 4,213 businesses in Merrimack County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
8 doctors and other health care providers list an office in Andover’s ZIP codes.
Nearest hospitals
Providers with an office here
| Nurse practitioners and physician assistants | 1 |
|---|---|
| Mental health providers | 5 |
| Physical and occupational therapists | 2 |
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
Pharmacies
Libraries (2 nearby)
Museums (1 nearby)
Theaters and performance venues
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 Andover School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Andover Elementary SchoolAndover | K–8 | 165 | Public | 2.0 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Proctor AcademyAndover | 9–12 | 381 | Nonsectarian | 2.1 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private 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.