Population 20,592 · Census ACS 2020–24
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Population and households in Groton
Household size in Groton
| Period | Groton | Connecticut | U.S. |
|---|---|---|---|
| 2006–10 | 2.20 | 2.57 | 2.68 |
| 2010–14 | 2.17 | 2.61 | 2.73 |
| 2015–19 | 2.14 | 2.57 | 2.71 |
| 2020–24 | 2.12 | 2.55 | 2.65 |
| Change | −0.08 | −0.02 | −0.03 |
Households in Groton are small: just 2.12 people on average, compared with 2.65 nationally. That is typical of places where many people live alone or as couples, and fewer have children at home. Since 2006–10, household size has edged down from 2.20, as it has nationally. Of the 145 Connecticut cities with 5,000+ people, only four have smaller households.
Household size: the average number of people living in each occupied home. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25010).
Median age in Groton
| Period | Groton | Connecticut | U.S. |
|---|---|---|---|
| 2006–10 | 37.6 | 40.0 | 37.7 |
| 2010–14 | 38.1 | 41.0 | 38.6 |
| 2015–19 | 39.4 | 42.0 | 39.6 |
| 2020–24 | 39.1 | 42.1 | 40.1 |
| Change | +1.5 | +2.1 | +2.3 |
Half of the people in Groton are younger than 39.1 and half are older, close to the national median of 40.1. The population here is younger than in Connecticut overall, where the median age is 42.1. The median age has climbed from 37.6 in 2006–10, mirroring the country.
Median age: the age that splits residents into two equal halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B01002).
Single-parent households in Groton
| Period | Groton | Connecticut | U.S. |
|---|---|---|---|
| 2006–10 | 12.2% | 11.2% | 12.3% |
| 2010–14 | 13.9% | 11.6% | 12.3% |
| 2015–19 | 15.5% | 10.8% | 11.6% |
| 2020–24 | 11.9% | 11.4% | 11.6% |
| Change | −0.3 pts | +0.2 pts | −0.6 pts |
Single-parent households are about as common in Groton as they are nationally: 11.9%, against 11.6%. Groton has a higher share of single-parent households than most Connecticut cities.
Single-parent households: households where one adult with no spouse present lives with children under 18. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B11003).
Housing in Groton
Renters in Groton
| Period | Groton | Connecticut | U.S. |
|---|---|---|---|
| 2006–10 | 53.0% | 30.8% | 33.3% |
| 2010–14 | 55.9% | 32.7% | 35.6% |
| 2015–19 | 56.3% | 33.9% | 36.0% |
| 2020–24 | 50.1% | 33.5% | 34.8% |
| Change | −2.9 pts | +2.7 pts | +1.5 pts |
Most households in Groton rent: 50.1% of occupied homes are rented, far above the national share of 34.8%. Expect more apartments, and more turnover, than in owner-heavy areas. Among homeowners, 38.7% have no mortgage at all, about the same as nationally. The renter share has fallen 2.9 points since 2006–10, even as the national share rose.
Renters: occupied homes that are rented rather than owned. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25003).
Vacant homes in Groton
| Period | Groton | Connecticut | U.S. |
|---|---|---|---|
| 2006–10 | 11.4% | 8.8% | 11.4% |
| 2010–14 | 10.7% | 9.5% | 11.4% |
| 2015–19 | 9.9% | 10.2% | 11.1% |
| 2020–24 | 9.5% | 7.9% | 9.6% |
| Change | −1.9 pts | −0.9 pts | −1.8 pts |
Vacancy in Groton is close to the national rate: 9.5% of homes are empty, against 9.6%. The rate is higher than in Connecticut as a whole (7.9%). Vacancy has fallen 1.9 points since 2006–10, in line with the national trend.
Vacant homes: homes with no one living in them, including vacation homes and homes for sale or rent. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25002).
Age of homes in Groton
| Period | Groton | Connecticut | U.S. |
|---|---|---|---|
| 2006–10 | 1965 | 1963 | 1974 |
| 2010–14 | 1968 | 1964 | 1975 |
| 2015–19 | 1969 | 1964 | 1977 |
| 2020–24 | 1971 | 1967 | 1980 |
| Change | +6 | +4 | +6 |
The housing in Groton is old by national standards: the median home dates to 1971, against 1980 for the U.S., so buyers will find more older houses, some of them due for updates. Still, homes here are newer than in Connecticut overall, where the median home dates to 1967. The median year built has moved up from 1965 in 2006–10, a sign of steady new building. Newer construction is concentrated in the north, while the west has the oldest housing.
Age of homes: the year that splits the housing stock into older and newer halves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25035).
Rent in Groton
| Period | Groton | Connecticut | U.S. |
|---|---|---|---|
| 2006–10 | $1,008 | $1,127 | $965 |
| 2010–14 | $1,018 | $1,218 | $1,040 |
| 2015–19 | $1,110 | $1,380 | $1,213 |
| 2020–24 | $1,424 | $1,702 | $1,571 |
| Change | +$415 | +$575 | +$606 |
Rent in Groton runs $1,424 a month at the median, utilities included, below the U.S. median of $1,571. Rents are up $415 a month from 2006–10, a 41% rise, a slower climb than the nation's. The typical renter here spends 29.9% of household income on rent, just under the 30% mark often used to define affordable rent, and a smaller share than renters pay nationally. The priciest rents are in the north; the most affordable are in the south.
Rent: monthly rent plus the utilities renters pay themselves. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B25064).
Education in Groton
Bachelor's degrees in Groton
| Period | Groton | Connecticut | U.S. |
|---|---|---|---|
| 2006–10 | 25.9% | 35.5% | 28.4% |
| 2010–14 | 28.0% | 37.0% | 29.6% |
| 2015–19 | 32.0% | 39.2% | 32.1% |
| 2020–24 | 38.8% | 42.3% | 35.6% |
| Change | +12.9 pts | +6.8 pts | +7.2 pts |
College degrees are a bit more common in Groton than nationally: 38.8% of adults 25 and older have a bachelor's or higher, against 35.6%. Even so, the share is lower than in Connecticut as a whole (42.3%). The share with a degree is up 12.9 points from 2006–10, mirroring the country.
Bachelor's degrees: adults 25 and older with a bachelor's degree or higher. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
High school graduates in Groton
| Period | Groton | Connecticut | U.S. |
|---|---|---|---|
| 2006–10 | 84.7% | 88.1% | 84.9% |
| 2010–14 | 90.9% | 89.2% | 86.1% |
| 2015–19 | 90.7% | 90.4% | 87.7% |
| 2020–24 | 92.7% | 91.2% | 89.3% |
| Change | +8.1 pts | +3.1 pts | +4.3 pts |
Just over nine in ten adults in Groton have finished high school (92.7%), above the national rate of 89.3%. The share with a diploma has risen 8.1 points since 2006–10, mirroring the country. Compared with other Connecticut cities, though, Groton has a lower share of high school graduates than most.
High school graduates: adults 25 and older with a high school diploma, GED or more. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B15003).
Jobs in Groton
| Period | Groton | Connecticut | U.S. |
|---|---|---|---|
| 2006–10 | 7.1% | 7.8% | 8.1% |
| 2010–14 | 7.2% | 9.7% | 9.4% |
| 2015–19 | 6.1% | 6.2% | 5.6% |
| 2020–24 | 5.6% | 5.6% | 5.4% |
| Change | −1.6 pts | −2.1 pts | −2.7 pts |
At 5.6%, unemployment in Groton is close to the national rate of 5.4%. Unemployment has fallen 1.6 points since 2006–10, as it has nationally. Each figure pools five years of surveys (2020–24), so it describes that whole stretch rather than today's job market.
Unemployment: people looking for work as a share of everyone working or looking. Source: BestNeighborhood calculations from U.S. Census Bureau ACS 5-year block-group estimates (table B23025).
Groton compared with nearby cities
| City | Household size | Median age | Single parents | Renters | Vacant homes | Median year built | Median rent | Bachelor's degree | High school diploma | Unemployment |
|---|---|---|---|---|---|---|---|---|---|---|
| Groton | 2.12 | 39.1 | 11.9% | 50.1% | 9.5% | 1971 | $1,424 | 38.8% | 92.7% | 5.6% |
| Conning Towers Nautilus Park | 2.76 | 27.7 | 17.1% | 80.4% | 8.8% | 1982 | $1,851 | 28.3% | 97.2% | 6.2% |
| New London | 2.11 | 37.6 | 17.3% | 63.8% | 8.5% | 1949 | $1,311 | 27.0% | 87.7% | 6.3% |
| Noank | 2.22 | 50.8 | 3.4% | 20.4% | 13.8% | 1961 | $1,448 | 61.6% | 98.0% | 1.4% |
| Groton Long Point | 2.00 | 66.3 | 3.4% | 8.9% | 48.0% | 1971 | $2,750 | 79.2% | 99.0% | 5.5% |
| Mystic | 2.27 | 51.8 | 5.8% | 20.3% | 10.6% | 1970 | $1,906 | 52.4% | 97.7% | 3.1% |
| Pleasure Beach | 2.52 | 45.6 | 12.4% | 18.3% | 8.5% | 1972 | $1,733 | 50.4% | 96.2% | 6.2% |
| Waterford | 2.34 | 46.3 | 6.3% | 21.8% | 9.4% | 1970 | $1,633 | 41.9% | 96.4% | 5.7% |
| Quaker Hill | 2.65 | 46.9 | 5.6% | 14.0% | 9.0% | 1961 | $1,711 | 37.2% | 95.8% | 5.4% |
| Gales Ferry | 2.80 | 38.2 | 12.3% | 19.3% | 11.8% | 1971 | $1,828 | 42.3% | 97.7% | 2.8% |
| Fishers Island | 2.33 | 46.6 | 7.7% | 33.3% | 73.8% | 1970 | $2,088 | 40.0% | 100.0% | 7.5% |
All figures 2020–24.
Cities with similar populations: Woodinville, WA · Alpine, CA · Alsip, IL · Altoona, IA · Alum Rock, CA · Anna, TX · Bay City, TX · North Bay Shore, NY · Olivehurst, CA · Old Jamestown, MO
About these numbers
Every figure on this page is a BestNeighborhood calculation from the Census Bureau's American Community Survey (ACS), built up from the Census block groups that make up Groton. Each ACS 5-year release pools five years of responses; this page shows the last 15 releases, 2006–10 through 2020–24. Neighboring releases share four of their five years, so they move gradually and small changes between them are within the survey's margin of error; in small places the lines can jump from one release to the next for the same reason. The maps show the same measures for each neighborhood, ranked against the whole country.
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