Groton, Connecticut Population 2021

38,222
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Groton is a city located in New London County Connecticut. Groton has a 2020 population of 38,222. Groton is currently declining at a rate of -0.28% annually and its population has decreased by -4.67% since the most recent census, which recorded a population of 40,093 in 2010. Groton reached it's highest population of 40,222 in 2012.

The average household income in Groton is $86,557 with a poverty rate of 9.88%. The median rental costs in recent years comes to $1,268 per month, and the median house value is $242,600. The median age in Groton is 34.1 years, 29.7 years for males, and 40 years for females.

Groton Demographics

According to the most recent ACS, the racial composition of Groton was:

  • White: 76.66%
  • Black or African American: 7.12%
  • Two or more races: 6.87%
  • Asian: 5.20%
  • Other race: 3.64%
  • Native American: 0.52%
  • Native Hawaiian or Pacific Islander: 0.00%
The current population of Groton, Connecticut is 38,222 based on our projections of the latest US Census estimates. The US Census estimates the 2018 population at 38,543.The last official US Census in 2010 recorded the population at 40,093.

Groton, Connecticut Population 2021

Population by Race

Race Population Percentage
White29,76376.66%
Black or African American2,7657.12%
Two or More Races2,6676.87%
Asian2,0185.20%
Some Other Race1,4123.64%
American Indian and Alaska Native2000.52%
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Groton Population by Race

Groton Population Pyramid $2021

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Groton Median Age

34.1


Total

29.7


Male

40


Female

Groton Adults

There are 31,367 adults, (5,953 of whom are seniors) in Groton.

Groton Age Dependency

52.8

Age Dependency Ratio

23.4

Old Age Dependency Ratio

29.3

Child Dependency Ratio

Groton Sex Ratio

Female

17,991

46.34%

Male

20,834

53.66%

Groton Population by Age

Groton Renter vs Owner Occupied by Household Type

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Groton Household Types

Type Owner Renter
Married64.6%35.4%
All48.5%51.5%
Non Family39.1%60.9%
Male33.5%66.5%
Female30.2%69.8%

48.5%

Rate of Home Ownership

Groton Households and Families

Type Count Average Size Owned
All15,9582.2448.5
Married6,7262.9864.6
Non Family6,6031.1939.1
Female1,8413.0130.2
Male7882.8933.5

2.89

Average Family Size

2.24

Average Household Size

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Groton Households by Type

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Education Attained Count Percentage
Less Than 9th Grade6042.36%
9th to 12th Grade1,0524.12%
High School Graduate7,32628.66%
Some College5,21820.41%
Associates Degree2,1338.34%
Bachelors Degree5,17620.25%
Graduate Degree4,05515.86%
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Groton Educational Attainment by Sex (over 25)

Groton Educational Attainment by Race

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Race Total High School Bachelors
White19,34218,4527,378
Hispanic2,4322,001439
Black1,5401,377370
Asian1,3931,308851
2+ Races990836215
Other Race73769164
Native American15715738

The highest rate of high school graduation is among native american people with a rate of 100.00%.

The highest rate of bachelors degrees is among asian people with a rate of 61.09%.

Groton Educational Attainment by Race

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Name Average Male Female
Overall$42,183$52,575$31,769
Less Than 9th Grade$21,767$21,695$21,813
High School Graduate$31,595$39,211$21,408
Some College$38,510$48,009$29,494
Bachelors Degree$56,250$70,482$43,617
Graduate Degree$77,534$94,602$64,766

$42,183

Average Earnings

$52,575

Average Male

$31,769

Average Female

Groton Earnings by Educational Attainment

Groton Language by Age

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Groton Language

85.25% of Groton residents speak only English, while 14.75% speak other languages. The non-English language spoken by the largest group is Spanish, which is spoken by 7.99% of the population.

Groton Language

Groton Poverty by Race

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Name Total In Poverty Poverty Rate
White24,8231,8757.55%
Hispanic4,84264913.40%
Black2,34961726.27%
Multiple2,48835914.43%
Other1,36523517.22%
Asian1,9461286.58%

9.88%

Overall Poverty Rate

7.54%

Male Poverty Rate

12.28%

Female Poverty Rate

Poverty in Groton

The race most likely to be in poverty in Groton is Black, with 26.27% below the poverty level.

The race least likely to be in poverty in Groton is Asian, with 6.58% below the poverty level.

The poverty rate among those that worked full-time for the past 12 months was 1.55%. Among those working part-time, it was 10.93%, and for those that did not work, the poverty rate was 15.50%.

Groton Poverty

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Name Poverty
Less Than 9th Grade14.68%
High School10.61%
Some College6.42%
Bachelors or Greater4.35%

Groton Poverty Rate by Education

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Rate Poverty
Female Unemployed38.74%
Male Unemployed28.26%
Female Employed6.43%
Male Employed2.63%

Groton Poverty Rate by Employment Status and Sex

Groton Income by Household Type

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Name Median Mean
Households$66,657$86,557
Families$79,915$100,130
Married Families$99,896-
Non Families$50,982$63,683
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Income by Household Type

Groton Marital Status

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Marriage Rates

44.9%

Overall Marriage Rate

42.3%

Male Marriage Rate

47.8%

Female Marriage Rate

Groton Married by Age and Sex

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Groton Marriage

The age group where males are most likely to be married is 35-44, while the female age group most likely to be married is 35-44.

Groton Marital Status by Race

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Groton Marital Status

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3,207

Number of Veterans

2,870

Male Veterans

337

Female Veterans

War Veterans
Second Gulf War1,130
Vietnam809
First Gulf War781
Korea239
World War II143

Groton Veterans by War

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Age Group Veterans
35 to 54804
75+665
18 to 34599
65 to 74593
55 to 64546

Groton Veterans by Age

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Name Veterans % of Total
White2,59311.77%
Hispanic35811.58%
Black28218.05%
Other Race12412.73%
2+ Races1219.70%
Native American6440.76%
Asian231.56%

Groton Veterans by Race

Groton Veterans by Education

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4.09%

Veteran Poverty Rate

22.36%

Veteran Disability Rate

Groton Veterans by Education

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71.8%

Labor Force Participation

55.8%

Employment Rate

6.4%

Unemployment Rate

Groton Employment by Age

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Groton Employment by Race

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Groton Employment by Education

Origin of Non-Citizens

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Non citizens include legal permanent residents (green card holders), international students, temporary workers, humanitarian migrants, and illegal immigrants.

Origin of Naturalized Citizens

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39.65%

Born in Groton

91.05%

Native Born

8.95%

Foreign Born

4.34%

Non Citizen

4.61%

Naturalized

Place of Birth

91.05% of Groton residents were born in the United States, with 39.65% having been born in Connecticut. 4.34% of residents are not US citizens. Of those not born in the United States, the largest percentage are from Asia.

Groton Place of Birth

Year Population Growth Annual Growth Rate
202138,222-107-0.28%
202038,329-107-0.28%
201938,436-107-0.28%
201838,543-281-0.72%
201738,824-241-0.62%
201639,065-200-0.51%
201539,265-456-1.15%
201439,721-361-0.90%
201340,082-140-0.35%
201240,2224021.01%
201139,820-273-0.68%
201040,0930.00%

Groton Population by Year