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Groton

Connecticutcity

Photograph of Groton
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Groton

Total population

9,490

Median home value

$306,600

38.8%

Bachelor's+

Median income

$79,577

Groton$80k
National$74k

Founded

1705

Air quality index

45Good
Elevation13 m
Weather65°F · Mostly Sunny
Coordinates41.33°, -72.07°

Demographic figures from US Census Bureau · ACS 5-year estimates. Overview below cites Wikipedia and may reference a different year.

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City facts

Founded
1705
Official website
www.groton-ct.gov

Facts from Wikidata (CC0).

Overview

Groton is a town in New London County, Connecticut, located on the Thames River. It is the home of General Dynamics Electric Boat, which is the major contractor for submarine work for the United States Navy. The Naval Submarine Base New London is located in Groton, and the pharmaceutical company Pfizer is also a major employer. Avery Point in Groton is home to a regional campus of the University of Connecticut. The town is part of the Southeastern Connecticut Planning Region. The population was 38,411 at the 2020 census.

Read more on Wikipedia

History & geography

History

Groton was established in 1705 when it separated from New London. The town was named after Groton, Suffolk in England. A hundred years before it was established, the Niantic people settled in the area between the Thames River and Pawcatuck River, but they eventually settled in Westerly, Rhode Island. The newcomers to the land were the Pequots, an Algonquian people who moved into the Connecticut River Valley. The summer of 1614 was the first time that the Pequots encountered white settlers. They started trading furs for the settlers' goods, such as steel knives, needles, and boots. In 1633, the Dutch bought land from them and opened a fur trading post. Meanwhile, the English bought land for settlement from the local tribes. The land was poor for farming, but access to the region's waterways left room for commerce and trade, and Groton became a town of ocean-going settlers. Most of the community began to build ships, and soon traders made their way to Massachusetts Bay Colony and Plymouth Colony to trade for food, tools, weapons, and clothing. John Leeds was the earliest shipbuilder, coming as a sea captain from Kent, England. He built a 20-ton brigantine, a two-masted sailing ship with square-rigged sails on the foremast and fore-and-aft sails on the mainmast. Thomas Starr built a 67-ton square-sterned vessel, and Thomas Latham launched a 100-ton brig on the Groton bank with mast standing and fully rigged. The sturdy ships built in Groton engaged in highly profitable trade with the islands of the Caribbean. The Battle of Groton Heights was fought on September 6, 1781, between American troops led by Colonel William Ledyard and British forces led by Benedict Arnold. At sunrise, a force of 1,700 British regulars landed at the mouth of the Thames River in New London and…

Geography

According to the United States Census Bureau, the town has a total area of , of which is land and , or 31.47%, is water. * Burnett's Corner—historic district located along Packer Road south of Route 184 * Center Groton * City of Groton—located along the Thames River ** Groton Heights or Groton Bank—historic district in the northern part of the city area * Groton Long Point * Long Hill * Mystic (06355)—a village within both the town of Stonington and the Town of Groton * Noank * Old Mystic * Poquonnock Bridge ** Fort Hill * Submarine Base area (Census designation: "Conning Towers-Nautilus Park") Other minor communities and geographic features are Bluff Point, Eastern Point, Esker Point, Jupiter Point, Mumford Cove, and West Pleasant Valley. Groton has a humid continental climate (Dfa) that closely borders a humid subtropical climate (Dfa).

Read full article on Wikipedia

Excerpted from the corresponding Wikipedia article (CC BY-SA).

Demographics & economy

Median age
39
Median home value
$306,600
Housing units
5,126
Poverty rate
18.6%
Unemployment
5.8%

Race & ethnicity

White
70.2%
Black
8%
Asian
6%
Hispanic
12.4%

Source: US Census Bureau — American Community Survey, 5-year estimates.

Geography

Latitude
41.3251
Longitude
-72.0669
Water area
3.68 mi²
View on OpenStreetMap

Coordinates & boundaries from the US Census TIGER/Line shapefiles.

Climate

Current forecast

This Afternoon
65°F
Mostly Sunny
Tonight
55°F
Mostly Cloudy
Friday
63°F
Chance Rain Showers
Friday Night
57°F
Rain Showers
Saturday
61°F
Rain Showers
Saturday Night
57°F
Showers And Thunderstorms

Forecast for Groton, CT from NOAA NWS API.

Air quality

US AQI — Good
45
PM2.5 (µg/m³)
2.5
PM10 (µg/m³)
3.2
Ozone (µg/m³)
84
NO₂ (µg/m³)
2.9

Current readings from Open-Meteo Air Quality API (Copernicus CAMS European reanalysis).

Industrial & pollution facilities

Natural hazard risk

Health (adults)

High blood pressure
32.2%
Diabetes
9.4%
Adult obesity
34%
Binge drinking
15.6%
Adult smoking
12%
No leisure activity
27.8%

Age-adjusted prevalence estimates from CDC PLACES (latest release).

Walkability

Amenities nearby

Wildlife & biodiversity

Observations (last 5 yrs, 10 mi)
557,248
Distinct species (top 10)
10

Most-observed species

  • American herring gull, Smithsonian Gull
    Larus smithsonianus Coues, 1862 · Aves
    16,299
  • Song Sparrow
    Melospiza melodia (A.Wilson, 1810) · Aves
    14,403
  • Northern Cardinal
    Cardinalis cardinalis (Linnaeus, 1758) · Aves
    12,242
  • American Crow
    Corvus brachyrhynchos C.L.Brehm, 1822 · Aves
    11,729
  • Black-capped Chickadee
    Poecile atricapillus (Linnaeus, 1766) · Aves
    11,718
  • Carolina Wren
    Thryothorus ludovicianus (Latham, 1790) · Aves
    11,664
  • Blue Jay
    Cyanocitta cristata (Linnaeus, 1758) · Aves
    11,403
  • Tufted Titmouse
    Baeolophus bicolor (Linnaeus, 1766) · Aves
    11,062

Citizen-science & research observations from the Global Biodiversity Information Facility (GBIF).

Schools

Total
38
Elementary
21
Middle
8
High
9
Other
0

Largest nearby schools

  • Robert E. Fitch High School
    High · Groton · 1,005 students · 10.6:1 ratio
  • East Lyme High School
    High · East Lyme · 966 students · 10.6:1 ratio
  • Groton Middle School
    Middle · Groton · 907 students · 11.8:1 ratio
  • Ledyard High School
    High · Ledyard · 743 students · 11.8:1 ratio
  • Waterford High School
    High · Waterford · 735 students · 11.3:1 ratio
  • East Lyme Middle School
    Middle · Niantic · 715 students · 11.2:1 ratio
  • Ella T. Grasso Technical High School
    High · Groton · 654 students · 13.6:1 ratio
  • Gallup Hill School
    Elementary · Ledyard · 618 students · 13.4:1 ratio

Public K–12 schools within ~10 mi from Urban Institute Education Data Portal (NCES Common Core of Data, 2022).

Earthquake history

Quakes ≥ 2.5 (25 yrs, 62 mi)
4
Largest magnitude
3.6
Largest event
2020-11-08

Most recent

Events from the USGS Earthquake Catalog (global) (FDSN Event Web Service).

Photos

Sights & places nearby

Notable people from here

People born within ~10 km, from Wikidata (CC0). Click any name for their Wikipedia article.

Nearby places in Connecticut

Browse all places in Connecticut →

Geography & sun

Elevation
43 ft (13 m)
Avg solar (kWh/m²/day)
3.91
Annual solar (kWh/m²)
1,426

Elevation, sunrise/sunset and daylight from Open-Meteo. Solar climatology from NASA POWER.

Nearby airports

Public attention

Wikipedia views (last 30 days)
3,658
Avg daily Wikipedia views
122
Attention level
Quiet

Pageview totals from the Wikimedia Pageviews API.

Books about Groton

Search results from Open Library.

Recent natural events nearby

Ground air-quality sensors

Recently spotted species

Research-grade observations from iNaturalist (within ~15 mi).

Nearest stream gauge

Site
POQUONNOCK RIVER AT LONG HILL, CT
Distance
2.2 mi
Streamflow
13.6 cfs
Gage height
5.77 ft

Live readings from USGS NWIS · measured 2026-09-21 20:30 UTC.

Events

Sources

  • • Wikipedia
  • • US Census Bureau (ACS 5-year estimates)
  • • NOAA National Weather Service
  • • Wikidata
  • • Open-Meteo Air Quality (CAMS)
  • • USGS Earthquake Catalog (global feed)
  • • USGS NWIS (water data)
  • • NCES via Urban Institute Education Data Portal
  • • GBIF (Global Biodiversity Information Facility)
  • • iNaturalist
  • • CDC PLACES
  • • Open-Elevation
  • • Open-Meteo / sunrise-sunset.org
  • • Wikipedia Pageviews API
  • • Open Library