Groton is a town in New London County, Connecticut, home to about 37,159 people across 31 square miles. Its ZIP codes are 06340 and 06355.
Homes sold for a median of $285 per square foot across 2 ZIP codes in the three months ending August 2026, and all of them were seller’s markets.
Each card is that ZIP code’s whole market, including any part outside Groton. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Groton’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Rhode Island T. F. Green International Airport (PVD)40 miles away |
|---|---|
| Closer regional airport | Westerly State Airport (WST)12 miles away |
| Nearest city of 250,000+ | Boston, MA85 miles away |
| Nearest city of 1 million+ | New York, NY110 miles away |
Straight-line distances from the center of Groton; 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.
Groton had 38,411 residents in the 2020 census, down 4% since 2000.
It’s the 27th largest of 169 towns in Connecticut by population.
New London County grew from 82,758 residents in 1900 to 268,555 in 2020.
New London County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 81°F in summer, and winter lows average 24°F. About 48.9 inches of rain and melted snow fall in a typical year, with about 25 inches of snow.
Source: NOAA 1991–2020 climate normals, Groton, CT weather station (about a mile away).
479 doctors and other health care providers list an office in Groton’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 37 |
|---|---|
| Specialist doctors | 36 |
| Dentists | 34 |
| Nurse practitioners and physician assistants | 64 |
| Mental health providers | 173 |
| Physical and occupational therapists | 106 |
| Optometrists | 9 |
| Chiropractors | 20 |
| Pharmacies | 12 |
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 (57 nearby)
Grocery stores (5 nearby)
Pharmacies (2 nearby)
Libraries (9 nearby)
Museums (16 nearby)
Theaters and performance venues (6 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.
Public schools here are run by Groton School District, Connecticut Technical Education and Career System, Learn. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Catherine Kolnaski Magnet SchoolGroton | Pre-K–5 | 375 | Public | 1.5 mi |
| Charles Barnum Magnet SchoolGroton | Pre-K–5 | 339 | Public | 2.5 mi |
| Mystic River Magnet SchoolMystic | Pre-K–5 | 520 | Public | 2.1 mi |
| Northeast Academy Magnet SchoolMystic | Pre-K–5 | 392 | Public | 3.1 mi |
| Thames River Magnet SchoolGroton | Pre-K–5 | 501 | Public | 2.1 mi |
| Groton Middle SchoolGroton | 6–8 | 884 | Public | 1.4 mi |
| Ella T. Grasso Technical High SchoolGroton | 9–12 | 684 | Career and Technical | 1.5 mi |
| Marine Science Magnet High SchoolGroton | 9–12 | 274 | Public | 2.4 mi |
| Robert E. Fitch High SchoolGroton | 9–12 | 942 | Public | 1.7 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Sacred Heart SchoolGroton | Pre-K–8 | 112 | Roman Catholic | 2.0 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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Shares ZIP codes with Stonington.
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.