Groton Town, CT demographics:
population, income, and more

Total population
9,490
1.6% year-over-year change
Median household income
$79,577/yr
14.0% year-over-year change
Housing units
5,126
-1.3% year-over-year change

Groton population

How many people live in Groton

Groton is home to 9,490 residents, according to the most recent Census data. Gender-wise, 51.1% of Groton locals are male, and 48.9% are female.

Total population
9,490
1.6% year-over-year change
Gender ratio
Male
51.1%
4,847
Female
48.9%
4,643
Value Percent YoY change
Male 4,847 51.1% -0.6%
Female 4,643 48.9% 3.9%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Groton is 39, with the population distributed as follows: about 13.6% are children under 15, then 16% are in the 15 to 24 age group. Adults between 25 and 44 make up 26.1% of the population, while another 28.1% fall into the 45 to 64 bracket. Finally, around 16.2% are 65 or older.

Median age
39
Age breakdown
Under 15
13.6%
15 to 24
16%
25 to 44
26.1%
45 to 64
28.1%
Over 65
16.2%
Value Percent YoY change
Under 15 1,286 13.6% 1.1%
15 to 24 1,518 16% 20.8%
25 to 44 2,481 26.1% -9.3%
45 to 64 2,668 28.1% 1.7%
Over 65 1,537 16.2% 5.7%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Groton, 89.2% of the population are US-born citizens, while 6.5% have gained naturalized citizenship. At the same time, 4.3% of residents are non-citizens. As for race, 70.2% of locals are Caucasian, 8% are African American and 6% have Asian roots. There’s also a share of 10.7% that includes residents with two or more races.

Citizenship
U.S.-born citizens
89.2%
Non-U.S.-born citizens
6.5%
Non-citizens
4.3%
Value Percent YoY change
U.S.-born citizens 8,464 89.2% 2.8%
Non-U.S.-born citizens 618 6.5% 2.7%
Non-citizens 408 4.3% -19.7%
Racial breakdown
White
70.2%
Black or African American
8%
American Indian and Alaska Native
0.1%
Asian
6%
Native Hawaiian and other Pacific Islander
0%
Two or more races
10.7%
Other
5.1%
Value Percent
White 6,664 70.2%
Black or African American 755 8%
American Indian and Alaska Native 7 0.1%
Asian 569 6%
Two or more races 1,012 10.7%
Other 483 5.1%

Households in Groton

A peek inside Groton households

Groton has 4,654 households, with an average of 2 members in each. Of these, 52.6% are families, while the remaining 47.4% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
4,654
-0.9% year-over-year change
Average people per household
2
Non-family households
2,204
Family households
2,450
Value Percent YoY change
Non-family households 2,204 47.4% 2.7%
Family households 2,450 52.6% -3.9%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Groton

The housing landscape of Groton

Groton's housing consists of 5,126 units, with 38% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 5.8% and offer a more compact, shared living style.

Housing units
5,126
-1.3% year-over-year change
Housing types
Value Percent
1 unit, detached 1,947 38%
1 unit, attached 297 5.8%
2 units 557 10.9%
3 or 4 units 948 18.5%
5 to 9 units 635 12.4%
10 to 19 units 101 2%
20 to 49 units 459 9%
50 or more units 181 3.5%
Mobile home 1 0%
Homes built since 2020
6
% year-over-year change

The age of buildings in Groton

In Groton, the median construction year is 1971. About 18.5% of homes were built before the 1940s, with another 1.9% going up by 1949. Most development happened in the second half of the 20th century. Then, 6.1% of homes were added from 2000 to 2009, 1.5% between 2010 and 2019, and 0.1% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 949 18.5% 2.4%
Built between 1940 and 1949 98 1.9% -36.0%
Built between 1950 and 1959 765 14.9% -17.9%
Built between 1960 and 1969 625 12.2% -13.7%
Built between 1970 and 1979 1,278 24.9% 9.6%
Built between 1980 and 1989 662 12.9% 54.0%
Built between 1990 and 1999 354 6.9% -26.4%
Built between 2000 and 2009 311 6.1% -1.0%
Built between 2010 and 2019 78 1.5% 18.2%
Built in 2020 or later 6 0.1% N/A
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Groton occupancy rates

Out of the 4,654 occupied housing units in Groton, 45.4% are owner-occupied, while 54.6% are lived in by tenants. Meanwhile, 9.2% of all homes on the local market sit vacant.

Occupied housing units
4,654
-0.9% year-over-year change
Occupancy breakdown
Renter occupied
2,540
Owner occupied
2,114
Value Percent YoY
change
Renter occupied 2,540 54.6% -7.8%
Owner occupied 2,114 45.4% 9.0%
Unoccupied housing units
9.2%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Groton housing costs

Housing costs in Groton come to a median of $1,300 per month, while tenants specifically pay a median gross rent of $1,250.

Median housing costs per month
$1,300/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Groton
$1,250/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Groton

Groton education at a glance

About 32.4% of the population in Groton went to high school, while 21.7% pursued college studies. Another 7.1% earned an associate degree and 25.7% hold a bachelor’s. Meanwhile, 11% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 166 2.1% -21.7%
High school diploma 2,590 32.4% -6.1%
College diploma 1,738 21.7% -6.4%
Associate degree 571 7.1% 12.6%
Bachelor's degree 2,058 25.7% 12.9%
Graduate degree 880 11% 19.6%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Groton

How much people earn in Groton

The average annual household income in Groton was $92,897 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +11.3% change from the previous year. At the same time, the median income stood at $79,577, reflecting a +14% shift over the same period.

Average household income in Groton
$92,897/year
11.3% year-over-year change
Median household income in Groton
$79,577/year
14.0% year-over-year change

Groton income by age

In Groton, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $91,679. Those with someone between 45 and 64 in charge, often well established professionally, earn $86,750 overall. Younger households, where the main provider is under 25 and just starting out, report a median income of $53,988, while those led by someone over 65, many of whom may be retired, have about $64,286 in earnings. Overall, 81.6% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
Under 25 $53,988 N/A
25 - 44 $91,679 23.3%
45 - 64 $86,750 4.9%
Over 65 $64,286 9.2%
Above poverty level
7,668
Below poverty level
1,728
Value Percent YoY
change
Above poverty level 7,668 81.6% 2.9%
Below poverty level 1,728 18.4% -2.3%

Average renter income in Groton

To get a better sense of what renters earn on average in Groton, their median household income was $36,914 according to 2022 Census data. In addition, the rent-to-income ratio in the area, at 40.6%, shows what portion of their earnings goes toward housing expenses.

Renter median household income
$36,914
Rent-to-income ratio
40.6%
Understanding the rent-to-income ratio can help renters gauge if local housing costs align with their earnings. A ratio under 30% usually signals affordability, while exceeding this mark means rent is taking a larger-than-recommended bite out of income. That could make it harder for you to cover other costs like transportation, healthcare, or child care.

Employment in Groton

Workforce and job types in Groton

The job market in Groton is powered by 4,990 working residents, spread across a range of industries and roles. 84.9% of the working population are employed in professional or administrative positions, while 15.1% are in hands-on or service-based jobs. Also, 3% run their own businesses, 69.4% are employed by private companies, and 19.2% work in the public sector.

Workforce demographics

Working population
4,990
-1.7% year-over-year change
White collar
4,236
Blue collar
754
Value Percent YoY change
White collar 4,236 84.9% -2.6%
Blue collar 754 15.1% 3.7%
Employer type
Self employees
3%
Private companies
69.4%
Governmental workers
19.2%
Not for profit companies
8.5%
Value Percent YoY change
Self employees 148 3% -23.3%
Private companies 3,461 69.4% -3.9%
Governmental workers 957 19.2% 12.2%
Not for profit companies 424 8.5% -1.2%
Unemployment rate
6.0%
-8.1% year-over-year change

Available workforce

The unemployment rate in Groton stands at 6%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Groton

How people get around in Groton

Commuting methods vary: 82.2% of residents travel by personal vehicle and 11.5% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 4,133 82.2% 2.8%
Taxicab 25 0.5% -10.7%
Bus or trolleybus 3 0.1% -97.8%
Motorcycle 3 0.1% 0.0%
Bicycle 34 0.7% 126.7%
Walk 578 11.5% -18.0%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Groton by zipcode?

Zipcode Population Number of households Median income Average income
06340 29,863 12,879 $81,792 $104,708
06355 12,173 5,364 $137,425 $164,866

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FAQs about Groton demographics 

What is the total population of Groton?

Groton has a total population of 9,490 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +1.6% compared to a year ago.

What is the gender ratio in Groton?

The gender ratio in Groton is as follows:
  • 51.1% males (4,847 residents)
  • 48.9% females (4,643 residents)

What is the median age in Groton?

The median age in Groton is 39.

What is the age distribution of the population in Groton?

The age distribution in Groton is as follows:
  • Under 15: 13.6% (1,286 residents)
  • Ages 15-24: 16% (1,518 residents)
  • Ages 25-44: 26.1% (2,481 residents)
  • Ages 45-64: 28.1% (2,668 residents)
  • Over 65: 16.2% (1,537 residents)

What is the racial and ethnic makeup of Groton?

The racial and ethnic makeup of Groton is as follows:
  • White: 70.2% (6,664 residents)
  • Black or African American: 8% (755 residents)
  • American Indian and Alaska Native: 0.1% (7 residents)
  • Asian: 6% (569 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 10.7% (1,012 residents)
  • Other: 5.1% (483 residents)

What percentage of the population in Groton are U.S.-born citizens?

U.S.-born citizens represent 89.2% of the population in Groton.

How many housing units are there in Groton?

There are 5,126 housing units in Groton, reflecting a -1.3% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Groton and what is the average household size?

Groton has a total of 4,654 households, with an average of 2 people in each.

What is the median household income in Groton?

Groton has a median household income of $79,577, representing a +14.0% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Groton?

The employment rate is 94% in Groton, with a workforce of 4,990 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 84.9% (4,236 residents)
  • Blue-collar workers: 15.1% (754 residents)

Places of employment:
  • Self-employed: 3% (148 residents)
  • Private companies: 69.4% (3,461 residents)
  • Governmental workers: 19.2% (957 residents)
  • Not-for-profit companies: 8.5% (424 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025