Groton ZIP Code List — New London County, CT

There are 2 unique ZIP codes in Groton, Connecticut. Area code: 860.

ZIP codes

22.54

sq mi land

4.72

sq mi water

860

area code

Groton, CT ZIP code map

About Groton, CT

Groton is a vibrant city located in Connecticut, known for its rich maritime history and beautiful coastal landscapes. This dynamic community is situated in New London County and is often recognized for its close proximity to the Long Island Sound. With a blend of industry and recreation, Groton offers a unique experience for both residents and visitors alike.

Location & geography

Groton is strategically located in southeastern Connecticut, just minutes away from the bustling city of New London to the west and the scenic Mystic to the east. The terrain includes a mix of scenic coastal areas and suburban neighborhoods, with a total land area of 22.54 square miles and a water area of 4.72 square miles. This city’s landscape is characterized by its waterfront, parks, and the Groton Long Point neighborhood, enhancing its picturesque charm.

Community & economy

The character of Groton reflects a blend of historical significance and modern living, supported by various local industries such as defense, healthcare, and education. Daily life in Groton is enhanced by community events, local festivals, and the presence of several parks and recreational facilities. Residents enjoy a lifestyle that balances work, family, and leisure activities, with access to local shops and restaurants contributing to the town's vibrant atmosphere.

Transportation

Groton is well-connected by major highways, including Interstate 95, which facilitates easy travel to other Connecticut cities and beyond. The city is served by the nearby Groton-New London Airport, which provides regional flights, while Amtrak services are available in New London for those seeking rail options. Public transportation is also accessible, with local bus services linking Groton to surrounding areas.

History

Groton was originally settled in the mid-1600s and has since grown into an essential location for shipbuilding and naval operations, given its proximity to the Thames River. The city played a pivotal role during the Revolutionary War, particularly in the Battle of Groton Heights, which is a significant historical event. Today, Groton continues to thrive as a center for the defense and submarine industries, with the Electric Boat Division being a notable employer.

Did you know?

One surprising fact about Groton is that it is home to the United States Navy's Submarine Base New London, the largest naval submarine base in the country. Additionally, the city is known for its beautiful beaches and parks, making it a desirable spot for both residents and tourists.

ZIP codes for Groton, CT (2)

ZIP code	City	County	Map
06340	Groton	New London	View map
06349	Groton	New London	View map

Demographics & statistics

29,672

Population

33.1

Median age

$76,138

Median household income

$43,058

Per capita income

$248,000

Median home value

$1,423

Median monthly rent

44.6%

Home ownership

9.7%

Poverty rate

5.7%

Unemployment

7,118

Housing units

35.0%

Bachelor's or higher

Age distribution

Male Female

1,056

Under 5

877

781

5–9

649

811

10–14

674

1,050

15–19

872

1,584

20–24

1,315

3,316

25–34

2,754

1,521

35–44

1,264

1,634

45–54

1,358

973

55–59

809

847

60–64

703

1,403

65–74

1,166

640

75–84

531

592

85+

492

← Male

Female →

Age summary

Group	Count	%
Under 18	5,729	19.3%
18 and over	23,943	80.7%
65 and over	4,824	16.3%
Median age	33.1 years

Race & ethnicity

White 69.5%

Two or more races 9.6%

Asian 6.7%

Black or African American 6.1%

Hispanic or Latino 5.4%

Other race 2.3%

American Indian / Alaska Native 0.4%

Group	Count	%
White	21,789	69.5%
Two or more races	3,024	9.6%
Asian	2,109	6.7%
Black or African American	1,903	6.1%
Hispanic or Latino	1,681	5.4%
Other race	734	2.3%
American Indian / Alaska Native	113	0.4%

Household income

Under $10k 3.6%

$10k–$15k 3.1%

$15k–$25k 6.7%

$25k–$35k 7.3%

$35k–$50k 11.8%

$50k–$75k 16.1%

$75k–$100k 18.6%

$100k–$150k 15.7%

$150k–$200k 7.8%

$200k+ 9.3%

Range	% of households
Under $10k	3.6%
$10k–$15k	3.1%
$15k–$25k	6.7%
$25k–$35k	7.3%
$35k–$50k	11.8%
$50k–$75k	16.1%
$75k–$100k	18.6%
$100k–$150k	15.7%
$150k–$200k	7.8%
$200k+	9.3%
Median income	$76,138

Housing

Home values

Under $50k 8.5%

$50k–$100k 3.2%

$100k–$150k 7.4%

$150k–$200k 17.3%

$200k–$300k 29.9%

$300k–$500k 17.7%

$500k–$1M 13.0%

$1M+ 3.1%

Housing overview

Metric	Value
Median home value	$248,000
Median rent / month	$1,423
Owner occupied	44.6%
Renter occupied	55.4%
Vacant	10.0%
Single-family detached	38.3%
Large apartment buildings	12.2%
Mobile homes	3.7%
Median rooms	5.0
Avg household size (owned)	2.21

Year built

Era	%
2020 or later	0.1%
2010–2019	3.6%
2000–2009	8.2%
1990–1999	12.0%
1980–1989	14.1%
1970–1979	21.8%
1960–1969	10.9%
1950–1959	12.8%
1940–1949	4.1%
1939 or earlier	12.4%

Bedrooms

Size	% of units
No bedroom (studio)	1.4%
1 bedroom	18.6%
2 bedrooms	38.3%
3 bedrooms	26.0%
4 bedrooms	12.0%
5+ bedrooms	3.7%

Vehicles per household

Vehicles	% of households
No vehicle	8.4%
1 vehicle	44.3%
2 vehicles	35.1%
3 or more	12.3%

Heating fuel

Fuel type	%
Utility gas	10.7%
Electricity	38.9%
Propane / LP gas	5.2%
Fuel oil	42.9%
Wood	0.3%
Solar	0.3%
No fuel used	1.4%

Households & families

Household type	Count	%
Married-couple family	4,759	37.2%
Cohabiting couple	880	6.9%
Male householder, no spouse	3,593	28.1%
Female householder, no spouse	3,548	27.8%
Households with children under 18	3,454	27.0%
Households with seniors (65+)	3,323	26.0%
Average household size	2.19

Marital status

Status	Male	Female
Never married	46.5%	31.6%
Married	40.7%	44.3%
Separated	0.6%	1.2%
Widowed	3.2%	6.7%
Divorced	9.1%	16.2%

Education

Less than 9th grade 3.4%

Some HS, no diploma 3.7%

HS graduate 26.9%

Some college, no degree 22.5%

Associate's degree 8.4%

Bachelor's degree 20.7%

Graduate / professional 14.3%

Metric	%
HS diploma or higher	92.9%
Bachelor's or higher	35.0%

School enrollment (ages 3–17)

Type	Count	%
Nursery / preschool	565	9.4%
Kindergarten	202	3.4%
Elementary school	2,414	40.2%
High school	1,300	21.6%
College / grad school	1,524	25.4%

Employment

Industry of employment

Education & healthcare 25.2%

Manufacturing 16.8%

Arts, food & hospitality 12.6%

Professional & management 11.6%

Retail trade 8.8%

Construction 5.2%

Public administration 5.1%

Other services 4.3%

Finance & real estate 4.1%

Transportation & utilities 3.2%

Wholesale trade 1.9%

Information 1.0%

Agriculture & mining 0.1%

Occupation

Category	%
Management, business & arts	45.5%
Service	19.4%
Sales & office	19.5%
Natural resources & construction	5.9%
Production & transportation	9.6%

Employment type

Type	%
Private sector	82.0%
Government	13.6%
Self-employed	4.2%
Unpaid family workers	0.1%

Commute

Method	%
Drive alone	72.2%
Carpool	6.5%
Public transit	1.6%
Walk	7.1%
Other means	2.1%
Avg commute (minutes)	17.8

Poverty

All people 9.7%

Under 18 years 14.8%

18 and over 8.5%

Married-couple families 1.9%

Female-led households 25.0%

Income support

Source	% of households
Social Security	26.2%
Retirement income	23.7%
Supplemental Security	4.0%
Cash public assistance	5.1%
Food stamps / SNAP	11.9%

Health indicators

Condition	%
High blood pressure	26.0%
High cholesterol	26.4%
Heart disease	4.9%
Stroke	2.2%
Asthma	10.5%
Arthritis	18.8%
Kidney disease	2.2%
Pulmonary disease	5.2%
Cancer	5.5%

Behavior / access	%
Binge drinking	18.9%
No physical activity	17.4%
Less than 7 hrs sleep	34.3%
Fair or poor health	10.2%
Poor mental health	15.0%
Poor physical health	7.8%
No health insurance	10.5%
Visited doctor (checkup)	74.3%
Visited dentist	70.0%
Cholesterol screening	87.1%
Teeth loss	10.1%

Veterans & disability

Veterans	Count	%
Civilian veterans	2,319	10.8%

Disability	%
Any disability	13.1%
Under 18	3.3%
18–64 years	10.1%
65 and over	35.8%

Health insurance coverage

Type	%
Private insurance	72.3%
Public insurance	37.3%
Uninsured under 19	1.4%

Language & origin

Language spoken at home (age 5+)

Language	Count	%
English only	27,739	93.5%
Spanish	1,342	4.8%
Other Indo-European	473	1.7%
Asian & Pacific Islander	279	1.0%
Other languages	590	2.1%

Place of birth & citizenship

Origin	Count	%
Native born (US)	26,882	90.6%
Born in same state	26,521	89.4%
Born in different state	12,631	42.6%
Foreign born	361	1.2%
Naturalized citizen	2,790	9.4%
Not a US citizen	1,587	56.9%

Ancestry

Ancestry	Count	%
Italian	4,616	15.6%
French	3,394	11.4%
Arab	976	3.3%
German	576	1.9%
Polish	284	1%

Ancestry	Count	%
English	119	0.4%
Dutch	95	0.3%
Irish	94	0.3%
Norwegian	67	0.2%

Technology access

Metric	% of households
Computer access	43.1%
Internet access	92.9%

Source: U.S. Census Bureau, American Community Survey 2025 estimates.

Frequently asked questions

What is the ZIP code for Groton, CT?

Groton, CT has one ZIP code: 06340.

What is the main ZIP code for Groton, CT?

The primary ZIP code for Groton, CT is 06340. The city uses area code 860 for phone service.

What county is Groton, CT in?

Groton is located in New London County, Connecticut.

How many ZIP codes are in Groton, CT?

Groton, CT has 1 ZIP code.