Demographics of Groton town, Connecticut

Groton town, Connecticut had 39,138 people on July 1, 2025, by the Census Bureau’s estimate: +799 since July 2020. Age, income, poverty, housing and origin below come from the survey, averaged over 2020–2024, each with its margin of error.

Groton town, in four figures

39,138
Population: July 1, 2025, Vintage 2025 estimate. The survey’s 2020–⁠2024 figure is 38,130 ±86.; +2.1%
Change since July 2020: +799 people.; 36.8 ±2.1
Median age: ACS 2020–⁠2024.; $88,284 ±$5,289
Median household income: ACS 2020–⁠2024, in 2024 dollars.

Population, year by year

July 1 estimates from the Census Bureau’s Vintage 2025. The Bureau publishes no births, deaths or migration for a town, so the change is the difference between one July estimate and the next.

Groton town, Connecticut's population grew 2.1% from July 2020 to July 2025, against +3.1% nationally

The July 1 estimate of Groton town, Connecticut's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).

Source: The Census Bureau

About this chart

The figures

Groton town, Connecticut's population grew 2.1% from July 2020 to July 2025, against +3.1% nationally. The July 1 estimate of Groton town, Connecticut's resident population and the nation's, each year of the Census Bureau's Vintage 2025, as a share of its July 2020 level (= 100).
July 1	Population	Index	United States
2020	38,339	100.0	100.0
2021	38,369	100.1	100.2
2022	37,988	99.1	100.7
2023	38,076	99.3	101.6
2024	39,130	102.1	102.5
2025	39,138	102.1	103.1

Population of Groton town, Connecticut on July 1 of each year, Vintage 2025
July 1	Population	Change
2020	38,339	—
2021	38,369	+30
2022	37,988	−381
2023	38,076	+88
2024	39,130	+1,054
2025	39,138	+8

Age, 2020–2024

The median age is 36.8 ±2.1: for men 33.7 ±1.4 and for women 40.8 ±3.0. Shares are of everyone the survey counts, in the Bureau’s sex-by-age table (B01001).

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People in Groton town by age, ACS 2020–2024
Age	People	Share	Connecticut	United States
Under 5	2,393 ±370	6.3% ±1.0	5.0% ±<0.1	5.6% ±<0.1
5 to 17	4,620 ±547	12.1% ±1.4	15.2% ±0.1	16.3% ±<0.1
18 to 24	4,609 ±571	12.1% ±1.5	9.3% ±0.1	9.1% ±<0.1
25 to 44	10,618 ±773	27.8% ±2.0	25.3% ±0.1	26.9% ±<0.1
45 to 64	8,472 ±674	22.2% ±1.8	26.7% ±0.1	24.8% ±<0.1
65 and over	7,418 ±645	19.5% ±1.7	18.5% ±0.1	17.2% ±<0.1

Income and poverty, 2020–2024

Median household income is $88,284 ±$5,289, and income per person $51,281 ±$2,940, in 2024 dollars. The median is $95,781 ±$732 in Connecticut and $80,734 ±$166 in the United States.

Households by income

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Households in Groton town by income, ACS 2020–2024
Household income	Households	Share	Connecticut	United States
Under $25,000	1,934 ±382	11.8% ±2.3	12.9% ±0.3	14.6% ±<0.1
$25,000 to $49,999	2,391 ±398	14.6% ±2.4	13.7% ±0.3	16.7% ±<0.1
$50,000 to $74,999	2,261 ±338	13.8% ±2.0	13.3% ±0.3	15.5% ±<0.1
$75,000 to $99,999	2,871 ±565	17.5% ±3.4	11.9% ±0.3	12.6% ±<0.1
$100,000 to $149,999	2,727 ±361	16.7% ±2.1	17.7% ±0.3	17.5% ±<0.1
$150,000 to $199,999	1,938 ±382	11.8% ±2.3	11.3% ±0.2	9.6% ±<0.1
$200,000 or more	2,252 ±388	13.8% ±2.3	19.2% ±0.3	13.4% ±0.1

Poverty by age

The poverty rate is the share of people whose family income is below the federal threshold for their family’s size, of everyone for whom the Bureau determines it (B17020).

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Poverty rate in Groton town by age, ACS 2020–2024
Age	Below poverty	Rate	Connecticut	United States
All ages	3,886 ±676	10.6% ±1.9	10.0% ±0.2	12.5% ±0.1
Under 18	1,064 ±370	15.2% ±5.0	13.0% ±0.5	16.1% ±0.1
18 to 59	2,164 ±441	10.9% ±2.2	9.4% ±0.3	11.6% ±0.1
60 and over	658 ±197	6.8% ±1.9	8.9% ±0.3	11.0% ±<0.1

Housing, 2020–2024

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Housing in Groton town, ACS 2020–2024
Measure	Groton town	Connecticut	United States
Housing units	18,155 ±543	1,541,822 ±276	143,775,355 ±10,234
Occupied	90.2% ±1.3	93.0% ±0.2	89.9% ±0.1
Vacant	9.8% ±1.6	7.0% ±0.2	10.1% ±0.1
Owner occupied	53.4% ±3.0	66.5% ±0.4	65.2% ±0.3
Renter occupied	46.6% ±2.9	33.5% ±0.3	34.8% ±0.1
Median home value	$340,100 ±$17,454	$366,900 ±$1,621	$332,700 ±$236
Median gross rent	$1,602 ±$55	$1,488 ±$10	$1,413 ±$2
Median year built	1974 ±2	1967 ±1	1980 ±1

Occupied and vacant are shares of all housing units; owner and renter occupied are shares of occupied units. Value and rent are medians in 2024 dollars.

Origin and place of birth, 2020–2024

Hispanic or Latino origin is not a race in the Census Bureau’s tables. Here the people of Hispanic origin, of any race, are one row, and everyone else is counted by race alone (B03002), so the rows add to the whole.

Hispanic origin and race

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People in Groton town by Hispanic origin and race, ACS 2020–2024
Origin	People	Share	Connecticut	United States
Hispanic or Latino	4,599 ±710	12.1% ±1.9	18.3% ±<0.1	19.3% ±<0.1
White alone, not Hispanic	26,640 ±972	69.9% ±2.5	61.9% ±0.1	57.4% ±<0.1
Black alone, not Hispanic	1,798 ±458	4.7% ±1.2	9.8% ±0.1	11.9% ±<0.1
Asian alone, not Hispanic	2,504 ±512	6.6% ±1.3	4.7% ±<0.1	5.9% ±<0.1
American Indian and Alaska Native alone, not Hispanic	0 to 37	0% to 0.1%	0.1% ±<0.1	0.5% ±<0.1
Native Hawaiian and Other Pacific Islander alone, not Hispanic	0 to 29	0% to 0.1%	< 0.1% ±<0.1	0.2% ±<0.1
Some other race alone, not Hispanic	51 to 201	0.1% to 0.5%	0.9% ±0.1	0.6% ±<0.1
Two or more races, not Hispanic	2,446 ±574	6.4% ±1.5	4.3% ±0.1	4.3% ±<0.1

A range (the estimate less and plus its margin) where the Bureau's estimate is too uncertain to state as one number: a coefficient of variation over 30%.

Place of birth and citizenship

“Born a citizen outside the states” counts people born in Puerto Rico, the island areas, or abroad to American parents. Naturalized citizens and those who are not citizens together make up the people born abroad (B05002).

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People in Groton town by place of birth and citizenship, ACS 2020–2024
Born	People	Share	Connecticut	United States
Born in the state	16,958 ±986	44.5% ±2.6	53.3% ±0.3	57.3% ±<0.1
Born in another state	17,165 ±867	45.0% ±2.3	27.1% ±0.2	26.9% ±<0.1
Born a citizen outside the states	846 ±234	2.2% ±0.6	3.9% ±0.1	1.7% ±<0.1
Born abroad	3,161 ±568	8.3% ±1.5	15.7% ±0.2	14.1% ±<0.1
Naturalized citizens	2,109 ±454	5.5% ±1.2	8.7% ±0.1	7.4% ±<0.1
Not citizens	1,052 ±300	2.8% ±0.8	7.1% ±0.2	6.8% ±<0.1

Groton town among the places and towns of Connecticut

27th of 168 places and towns of 5,000 or more by the survey’s 2020–2024 count. Every one is listed on the Connecticut page.

Places of Connecticut near Groton town in population, ACS 2020–2024
Place	ACS 2020–⁠2024
Wallingford town	44,362 ±31
Southington town	43,803 ±34
Shelton city	41,889 ±86
Enfield town	41,090 ±36
Norwich city	39,973 ±44
Groton town	38,130 ±86
Trumbull town	37,281 ±29
Manchester CDP	36,759 ±1,174
Torrington city	35,547 ±33
Glastonbury town	35,293 ±52
Naugatuck borough	31,800 ±63

Sources

Census Bureau population estimates — incorporated places and New England towns — U.S. Census Bureau · U.S. Government work · retrieved September 25, 2026
American Community Survey 5-year estimates — table-based Summary File · U.S. Government work

Compiled automatically from Census Bureau population estimates — incorporated places and New England towns and American Community Survey 5-year estimates — table-based Summary File by a checked SQL query · Editor: Kian O'Connor · How this site is built

Data retrieved September 25, 2026