Zip code 06340: Groton, Connecticut

Q: What city is zip code 06340?

06340 is assigned to Groton, Connecticut. The city name is the one the Postal Service prefers for mail addressed to this zip code.

Q: What is the population of 06340?

About 29,863 people live in 06340, according to the Census Bureau's American Community Survey.

Q: What is the median household income in 06340?

The median household income in 06340 is $81,792.

Q: What zip codes are near 06340?

The closest zip codes to 06340 are 06320, 06388, 06355, 06349, 06372.

Residential delivery areaEastern Time

Population

29,863

Median household income

$82K

U.S. $81K

Median home value

$295K

U.S. $333K

Median rent

$1,599/mo

U.S. $1,413

Median age

33.7

U.S. 38.9

Land area

23 sq mi

1,325 people/sq mi

Boundary is the Census Bureau's ZIP Code Tabulation Area, which closely tracks the postal delivery area.

About 06340

06340 is a suburban zip code in Groton, Connecticut, covering 23 sq mi of land. About 29,863 people live here, or 1,325 per square mile. The median resident is 33.7 years old, compared with 38.9 nationally.

The median household earns $81,792 a year, close to the national median of $80,734. 12.7% of residents live below the poverty line (U.S.: 12.5%). A typical home is valued at $294,700, or 3.6 years of median household income (U.S.: 4.1 years), which makes homes about as affordable as the national average for local earners. 45% of occupied homes are lived in by their owners, and renters pay a median of $1,599 a month.

39% of adults hold a bachelor's degree or higher (U.S.: 36%). Commuters average 18.2 minutes each way, and 13% of workers work from home. The most common jobs among working residents are in management; healthcare; and engineering and science.

How 06340 compares

Sorted from highest to lowest national percentile

Veterans9.9%
89th
U.S. 6.2% · CT 4.7%24th of 277 in CT
Tech workers5.1%
80th
U.S. 3.8% · CT 3.6%45th of 276 in CT
Housing vacancy10.3%
73rd
U.S. 10.1% · CT 7%62nd of 275 in CT
Per capita income$47,211
67th
U.S. $44,673 · CT $55,915191st of 277 in CT
Government workers16.2%
67th
U.S. 14.5% · CT 13.1%77th of 276 in CT
Median earnings per worker$54,526
66th
U.S. $49,666 · CT $57,739187th of 275 in CT
Bachelor's degree or higher39.2%
64th
U.S. 35.7% · CT 42.5%170th of 277 in CT
Median gross rent$1,599
61st
U.S. $1,413 · CT $1,48899th of 247 in CT
Unemployment rate5.5%
61st
U.S. 5.2% · CT 5.6%99th of 276 in CT
Income inequality (Gini)0.448
61st
U.S. 0.483 · CT 0.499115th of 274 in CT
Poverty rate12.7%
59th
U.S. 12.5% · CT 10%55th of 276 in CT
Diversity index53.6
58th
U.S. 61.4 · CT 5770th of 277 in CT
Healthcare workers10%
58th
U.S. 9.7% · CT 10.4%136th of 276 in CT
Work from home13.3%
53rd
U.S. 15.1% · CT 16%180th of 276 in CT
Median household income$81,792
52nd
U.S. $80,734 · CT $95,781211th of 267 in CT
Residents 65 and older16.7%
51st
U.S. 17.2% · CT 18.5%194th of 277 in CT
Population29,863
49th
U.S. 334,922,499 · CT 3,624,50831st of 277 in CT
Population density1,325/sq mi
49th
U.S. 95/sq mi · CT 749/sq mi95th of 277 in CT
Foreign-born residents8.7%
46th
U.S. 14.1% · CT 15.7%149th of 277 in CT
Median home value$294,700
43rd
U.S. $332,700 · CT $366,900197th of 267 in CT
Rent-burdened renters47.4%
37th
U.S. 51.1% · CT 52.6%157th of 267 in CT
Broadband access89.7%
32nd
U.S. 91% · CT 92.2%218th of 275 in CT
Uninsured rate4.2%
24th
U.S. 8.4% · CT 5.4%97th of 276 in CT
Residents under 1818.7%
23rd
U.S. 22% · CT 20.2%157th of 277 in CT
Median age33.7
14th
U.S. 38.9 · CT 41.1254th of 277 in CT
Homeownership rate44.5%
13th
WeaknessU.S. 65.2% · CT 66.5%243rd of 275 in CT
Self-employed workers5.7%
8th
U.S. 10% · CT 9.9%237th of 276 in CT
Average commute18.2 min
6th
StrengthU.S. 26.4 min · CT 26.5 min263rd of 268 in CT

Measure	06340	CT	U.S.	National percentile	Rank in CT
Veterans	9.9%	4.7%	6.2%	89th	24th of 277
Tech workers	5.1%	3.6%	3.8%	80th	45th of 276
Housing vacancy	10.3%	7%	10.1%	73rd	62nd of 275
Per capita income	$47,211	$55,915	$44,673	67th	191st of 277
Government workers	16.2%	13.1%	14.5%	67th	77th of 276
Median earnings per worker	$54,526	$57,739	$49,666	66th	187th of 275
Bachelor's degree or higher	39.2%	42.5%	35.7%	64th	170th of 277
Median gross rent	$1,599	$1,488	$1,413	61st	99th of 247
Unemployment rate	5.5%	5.6%	5.2%	61st	99th of 276
Income inequality (Gini)	0.448	0.499	0.483	61st	115th of 274
Poverty rate	12.7%	10%	12.5%	59th	55th of 276
Diversity index	53.6	57	61.4	58th	70th of 277
Healthcare workers	10%	10.4%	9.7%	58th	136th of 276
Work from home	13.3%	16%	15.1%	53rd	180th of 276
Median household income	$81,792	$95,781	$80,734	52nd	211th of 267
Residents 65 and older	16.7%	18.5%	17.2%	51st	194th of 277
Population	29,863	3,624,508	334,922,499	49th	31st of 277
Population density	1,325/sq mi	749/sq mi	95/sq mi	49th	95th of 277
Foreign-born residents	8.7%	15.7%	14.1%	46th	149th of 277
Median home value	$294,700	$366,900	$332,700	43rd	197th of 267
Rent-burdened renters	47.4%	52.6%	51.1%	37th	157th of 267
Broadband access	89.7%	92.2%	91%	32nd	218th of 275
Uninsured rate	4.2%	5.4%	8.4%	24th	97th of 276
Residents under 18	18.7%	20.2%	22%	23rd	157th of 277
Median age	33.7	41.1	38.9	14th	254th of 277
Homeownership rateWeakness	44.5%	66.5%	65.2%	13th	243rd of 275
Self-employed workers	5.7%	9.9%	10%	8th	237th of 276
Average commuteStrength	18.2 min	26.5 min	26.4 min	6th	263rd of 268

The percentile is the share of Americans who live in a zip code with a lower value, so the 50th percentile is typical. Rank 1 is the highest value in the state. Both include zip codes with at least 100 residents. Strengths and weaknesses mark measures in the best or worst fifth nationally, where higher or lower is clearly better (income, poverty, education, commute, broadband, insurance and similar). Measures like age or density are left unmarked.

People

Age

Under 5

12%

5–17

14%

18–24

20%

25–34

10%

35–44

45–54

12%

55–64

65–74

75+

Median age

33.7

Under 18

18.7%

65 and over

16.7%

Race and ethnicity

White66%
Black6%
Hispanic14%
Asian7%
Native American0.1%
Pacific Islander0%
Other0.3%
Multiracial7%

Diversity index

53.6

U.S. 61.4

Foreign-born

8.7%

U.S. 14.1%

Born in state

43.9%

Language spoken at home (households)

English only

86%

Spanish

Other Indo-European

Asian / Pacific

Other

0.3%

Households

Households: 12,879
Average household size: 2.2
Family households: 56.8%
Married couples: 37.9%
Living alone: 34%
Veterans (of adults): 9.9%
Male / female: 54% / 46%

Income and poverty

Household income distribution

<$25k

14%

$25–50k

17%

$50–75k

14%

$75–100k

19%

$100–150k

16%

$150–200k

$200k+

12%

Median household income

06340

$81,792

Connecticut

$95,781

United States

$80,734

Per capita income

$47,211

U.S. $44,673

Poverty rate

12.7%

U.S. 12.5%

Households earning $150K+

20.2%

U.S. 23%

Income inequality (Gini)

0.448

U.S. 0.483

Housing

Median home value

06340

$294,700

Connecticut

$366,900

United States

$332,700

Median gross rent

06340

$1,599

Connecticut

$1,488

United States

$1,413

Types of housing

Single-family

51%

2–4 units

18%

5–19 units

15%

20+ units

14%

Mobile home

Boat, RV, van

Housing units: 14,359
Owner-occupied: 44.5%
Vacant: 10.3%
Median year built: 1976
Median rooms: 5
Renters paying 30%+ of income: 47.4%
Renters paying 50%+ of income: 24.5%
Home value to income: 3.6× (U.S. 4.1×)

Work and commute

How people get to work

Drove alone

68%

Carpooled

Transit

0.4%

Walked

Bicycle

0.6%

Worked from home

13%

Other

Commute time (one way)

<10 min

24%

10–19

45%

20–29

15%

30–44

45–59

60+

Average commute

18.2 min

U.S. 26.4 min

Unemployment

5.5%

U.S. 5.2%

In labor force

67.8%

U.S. 63.5%

Jobs and careers

What employed residents do, wherever they work

Occupations

Management

13%

Healthcare

10%

Engineering and science

10%

Sales

Education

Office and admin

Construction and repair

Production

Cleaning and personal care

Computer and math

Food service

Business and finance

Legal and social services

Transportation and moving

Arts, media and sports

Police and fire

0.9%

Farming, fishing and forestry

0.2%

Industries

Manufacturing

20%

Health care and social assistance

15%

Professional and technical services

10%

Education

10%

Retail

Restaurants and hotels

Public administration

Finance, insurance and real estate

Transportation, warehousing and utilities

Other services

Construction

Arts and recreation

Admin, support and management

Information

Wholesale

Agriculture and mining

0.4%

Median earnings per worker

$54,526

U.S. $49,666

Self-employed

5.7%

U.S. 10%

Government workers

16.2%

U.S. 14.5%

Nonprofit workers

8.8%

U.S. 8.8%

Median earnings by type of work

Type of work	06340	U.S.
Management, business, science and arts	$75,719	$74,888
Service	$31,524	$26,804
Sales and office	$46,617	$40,476
Construction and maintenance	$49,458	$49,199
Production and transportation	$41,966	$39,989

Education, internet and health coverage

Highest education (adults 25+)

No diploma

High school

27%

Some college

20%

Associate's

Bachelor's

23%

Graduate

16%

High school graduate or higher: 94.1%
Bachelor's degree or higher: 39.2%
Graduate or professional degree: 16%
Households with broadband: 89.7%
Cable, fiber or DSL: 81.8%
No internet access: 7.2%
Without health insurance: 4.2%
Limited-English households: 2.7%

Geography

City (USPS): Groton
State: Connecticut
Center point: 41.3544° N, 72.0403° W
Land area: 23 sq mi
Water area: 4.7 sq mi
Time zone: Eastern Time (UTC-5, UTC-4 in summer)
Zip type: Residential delivery area

Cities and towns within this zip

Conning Towers-Nautilus Park (unincorporated)23% of zip
Groton14% of zip
Long Hill (unincorporated)7% of zip
Poquonock Bridge (unincorporated)6% of zip
Noank (unincorporated)6% of zip
Groton Long Point2% of zip

Census places overlapping the zip's area. Mail may use a different city name than the municipality.

Zip codes near 06340

Search by radius

Zip	City	Distance	Population	IncomeMedian income	Home value
06320	New London, CT	3.2 mi	27,703	$59,170	$253,300
06388	West Mystic, CT · PO box	3.4 mi	—	—	—
06355	Mystic, CT	3.6 mi	12,173	$137,425	$453,400
06349	Groton, CT · PO box	4.1 mi	—	—	—
06372	Old Mystic, CT · PO box	5.3 mi	—	—	—
06335	Gales Ferry, CT	5.6 mi	6,307	$118,116	$322,400
06375	Quaker Hill, CT	5.6 mi	3,670	$111,833	$326,000
06385	Waterford, CT	6.1 mi	15,966	$100,484	$365,400
06339	Ledyard, CT	6.6 mi	9,113	$106,403	$330,500
06378	Stonington, CT	7.1 mi	5,555	$135,714	$593,400
06390	Fishers Island, NY	7.1 mi	72	$98,125	—
06338	Mashantucket, CT	8.4 mi	27	$137,500	$433,300

Zip codes like 06340 elsewhere

Matched on income, home values, age, density, education, housing and commuting

Questions about 06340

What city is zip code 06340?

06340 is assigned to Groton, Connecticut. The city name is the one the Postal Service prefers for mail addressed to this zip code.

What is the population of 06340?

About 29,863 people live in 06340, according to the Census Bureau's American Community Survey.

What time zone is 06340 in?

06340 is in Eastern Time.

What is the median household income in 06340?

The median household income in 06340 is $81,792.

What zip codes are near 06340?

The closest zip codes to 06340 are 06320, 06388, 06355, 06349, 06372.

Demographic figures are 2020–2024 American Community Survey 5-year estimates for ZIP Code Tabulation Area 06340, from the U.S. Census Bureau. Small areas have wide margins of error. How we build these numbers.