United States › Connecticut › Groton CITY
Groton Connecticut · 10,160 residents (2025 est.) · 3.08 sq mi
Time machine
COMPARE TO 1990 Census 2000 Census 2009 ACS 2010 ACS 2011 ACS 2012 ACS 2013 ACS 2014 ACS 2015 ACS 2016 ACS 2017 ACS 2018 ACS 2019 ACS 2020 ACS 2021 ACS 2022 ACS 2023 ACS
The short version
Groton is a city of 9,490 people in Connecticut. Owners hold 45% of the housing stock. Density works out to 3,078 people per square mile. The average commute runs 17 minutes. 18.6% of people here live below the federal poverty line. People stay put here: 81% were in the same home a year ago.
At a glance
Average income
near the US median
US median: $82,259
Mid-age
median age 39.0
US median: 38.9
Average education
39% hold a bachelor's degree
US average: 36%
Less affordable
home values up 36%, inflation adjusted
US median home: $376,019
Section 01
Population & growth from 10,010 in 2000
10,160 in 2025 (Census Bureau estimate)
3,078 / sq mi
+1%since 2009
from 3,045 / sq mi in 2009
US average: 281
from 31.6 in 2000
US average: 38.9
Population, 1990 – 2024
9K 9K 10K 10K 11K 1990 2000 2010 2020 2024 Groton Age distribution, 2024
BAR + DOT: THIS PLACE · TICK: US AVERAGE
Section 02
Income & economy $79,577
+8%inflation adjusted, since 2000
from $40,515 in 2000
US average: $82,259
from $22,239 in 2000
US average: $44,673
Households earning $100K+
from 30.9% in 2009
US average: 53.3%
from 9.9% in 2000
US average: 12.5%
from 0.426 in 2010
US average: 0.476
Workforce by industry, 2024
Professional, scientific, technical 2.4%
Education & health services 2.2%
Public administration 2.1%
Arts, entertainment, food 1.7%
Transportation & warehousing 1.3%
Agriculture, forestry, fishing 0%
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$306,600
+36%inflation adjusted, since 2000
from $123,500 in 2000
US average: $376,019
$1,250
+11%inflation adjusted, since 2000
from $620 in 2000
US average: $1,442
from 39.9% in 2000
54.6% rent
from 11.7% in 2009
US average: 10.0%
2.03 people
−10%since 2009
from 2.25 people in 2009
US average: 2.54
from 28.3% in 2009
US average: 22.9%
from 36.3% in 2009
US average: 47.4%
from 4.4 in 2009
Years of local income it takes to buy a local home, on a scale of about 0 to 15. Lower is more affordable.
Our index, 0 to 100. Higher means faster recent growth in incomes, home values, and college degrees.
Section 04
Race & ethnicity 2000
White, non-Hispanic 74.8%(7,485)
Hispanic / Latino 7.7%(773)
2024
White, non-Hispanic 67%(6,362)
Hispanic / Latino 12.4%(1,175)
from 57 in 2009
Our index, 0 to 100. Higher means a more even mix of racial and ethnic groups.
Section 04 · Origins
Detailed origins & ancestry Ancestry
+ 23 more ancestry groups with data from 18.8% in 2000
US average: 35.6%
High school or higher
from 89.5% in 2000
US average: 89.6%
from 7.1% in 2000
US average: 14.0%
Section 06
Commute & transportation from 12.2 min in 2000
US average: 26.5
from 75.5% in 2009
US average: 68.9%
from 12.5% in 2009
US average: 8.5%
from 2.8% in 2009
US average: 3.2%
from 1.9% in 2009
US average: 15.0%
from 6.6% in 2009
US average: 2.4%
from 0.6% in 2009
US average: 0.4%
from 10.9% in 2009
US average: 8.3%
Section 07
Work & employment from 8.5% in 2011
US average: 5.2%
from 74.4% in 2011
US average: 63.5%
Women 20-64 in the labor force
from 81.7% in 2020
US average: 74.6%
from 12.7% in 2009
US average: 13.1%
from 36.4% in 2009
US average: 42.5%
Section 08
People & community from 8.1% in 2009
US average: 14.1%
from 11.6% in 2009
US average: 6.2%
from 11.7% in 2012
US average: 13.3%
from 9.2% in 2013
US average: 8.4%
from 85.5% in 2017
US average: 91.0%
Computer in household
from 88.2% in 2020
US average: 95.5%
from 78.1% in 2020
US average: 87.7%
from 83.4% in 2016
US average: 77.7%
from 8.8% in 2016
US average: 13.6%
Marital status
Men 15+
Never married 42.9%(1,742)
Women 15+
Never married 39.9%(1,654)
SHARE WITHIN EACH SEX · POPULATION 15 AND OVER · 2024
Section 09
Health coverage from 9.2% in 2013
US average: 8.4%
from 52.5% in 2020
US average: 54.8%
Direct-purchase
from 8.2% in 2020
US average: 13.8%
from 16.0% in 2020
US average: 18.4%
from 31.8% in 2020
US average: 20.9%
VA health care
from 1.1% in 2020
US average: 2.2%
Any private
from 63.1% in 2020
US average: 67.1%
Any public
from 42.2% in 2020
US average: 36.7%
Shares are "alone or in combination": a person with both Medicare and Medicaid counts in each, so categories overlap and do not sum to 100%.
Section 09 · Service history
Veterans Veterans by period of service, 2024
Gulf War (2001 or later) 39.9%(242)
Gulf War (1990s) 44.7%(271)
Share of the 606 veterans here. A veteran who served across eras counts in each, so shares can total more than 100%. Peacetime-only service is included in the total but not shown as an era.
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Drill deeper
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Frequently asked
How many people live in Groton, Connecticut? Groton, Connecticut has about 9,490 residents according to the 2024 American Community Survey.
What is the median household income in Groton, Connecticut? The typical household in Groton, Connecticut earns about $79,577 a year. Half of households make more than that, and half make less.
Is Groton, Connecticut expensive? In Groton, Connecticut, the median home is worth about $306,600, and the typical rent is about $1,250 a month.
How educated are people in Groton, Connecticut? About 38.8% of adults age 25 and over in Groton, Connecticut hold a bachelor's degree or higher.
What is the poverty rate in Groton, Connecticut? About 18.6% of people in Groton, Connecticut live below the federal poverty line.
Has Groton, Connecticut grown since 1990? Yes, Groton, Connecticut has shrunk since 1990. The population has lost about 347 residents, a change of about -4 percent over that period.
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