Population 9,923 · Census ACS 2020–24
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Population and households in Groton
Household size in Groton
| Period | Groton | Boston area | Massachusetts | U.S. |
|---|---|---|---|---|
| 2006–10 | 2.88 | 2.54 | 2.53 | 2.68 |
| 2010–14 | 2.68 | 2.59 | 2.57 | 2.73 |
| 2015–19 | 2.74 | 2.60 | 2.57 | 2.71 |
| 2020–24 | 2.94 | 2.55 | 2.52 | 2.65 |
| Change | +0.06 | +0.01 | −0.01 | −0.03 |
Groton is a place of big households: 2.94 people per home on average, compared with 2.65 nationally. Numbers like that usually point to plenty of families with kids. Since 2006–10, household size has crept up from 2.88, even as the national average fell. Only 16 of the 275 Massachusetts cities with 5,000+ people have larger 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 | Boston area | Massachusetts | U.S. |
|---|---|---|---|---|
| 2006–10 | 42.0 | 38.9 | 39.4 | 37.7 |
| 2010–14 | 44.7 | 39.7 | 40.1 | 38.6 |
| 2015–19 | 45.3 | 40.4 | 41.0 | 39.6 |
| 2020–24 | 42.5 | 40.8 | 41.4 | 40.1 |
| Change | +0.5 | +1.9 | +2.0 | +2.3 |
The median resident of Groton is 42.5 years old, a bit older than the national median of 40.1. The median age has crept up from 42.0 in 2006–10, a smaller shift than nationally. The youngest areas are in the southwest, the oldest in the east.
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 | Boston area | Massachusetts | U.S. |
|---|---|---|---|---|
| 2006–10 | 7.1% | 10.4% | 11.0% | 12.3% |
| 2010–14 | 7.2% | 10.2% | 11.0% | 12.3% |
| 2015–19 | 5.9% | 9.6% | 10.3% | 11.6% |
| 2020–24 | 6.6% | 9.7% | 10.6% | 11.6% |
| Change | −0.5 pts | −0.7 pts | −0.4 pts | −0.6 pts |
Single parents head only 6.6% of households in Groton, well below the national share of 11.6%. Compared with other Massachusetts cities, Groton has a lower share of single-parent households than most.
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 | Boston area | Massachusetts | U.S. |
|---|---|---|---|---|
| 2006–10 | 15.7% | 36.8% | 36.0% | 33.3% |
| 2010–14 | 15.8% | 38.5% | 37.7% | 35.6% |
| 2015–19 | 14.4% | 38.3% | 37.6% | 36.0% |
| 2020–24 | 11.7% | 38.4% | 37.5% | 34.8% |
| Change | −4.0 pts | +1.6 pts | +1.5 pts | +1.5 pts |
Only 11.7% of households in Groton rent their homes, far below the national share of 34.8%, so most residents are owners who tend to stay put. Nearly a third of owners (31.7%) have paid off their mortgages, below the national share of 39.8%. The renter share is down 4.0 points from 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 | Boston area | Massachusetts | U.S. |
|---|---|---|---|---|
| 2006–10 | 10.1% | 8.1% | 9.5% | 11.4% |
| 2010–14 | 6.8% | 7.4% | 9.1% | 11.4% |
| 2015–19 | 5.3% | 7.3% | 8.9% | 11.1% |
| 2020–24 | 3.7% | 6.7% | 7.9% | 9.6% |
| Change | −6.4 pts | −1.4 pts | −1.6 pts | −1.8 pts |
Empty homes are scarce in Groton: just 3.7% sit vacant, compared with 9.6% nationally, a sign of a tight housing market. Vacancy is down 6.4 points from 2006–10, a much bigger shift than nationally. Groton has a lower vacancy rate than at least four in five Massachusetts cities.
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 | Boston area | Massachusetts | U.S. |
|---|---|---|---|---|
| 2006–10 | 1981 | 1958 | 1958 | 1974 |
| 2010–14 | 1982 | 1959 | 1959 | 1975 |
| 2015–19 | 1981 | 1961 | 1961 | 1977 |
| 2020–24 | 1987 | 1964 | 1963 | 1980 |
| Change | +7 | +6 | +5 | +6 |
The housing in Groton is younger than the country's: half of it was built after 1987, against 1980 nationally. The median year built has moved up from 1981 in 2006–10, a sign of steady new building. The newest homes are mostly in the west, the oldest in the east. Only four of the 275 Massachusetts cities with 5,000+ people have newer homes.
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 | Boston area | Massachusetts | U.S. |
|---|---|---|---|---|
| 2006–10 | $934 | $1,171 | $1,085 | $965 |
| 2010–14 | $1,382 | $1,251 | $1,157 | $1,040 |
| 2015–19 | $1,174 | $1,537 | $1,398 | $1,213 |
| 2020–24 | $1,481 | $2,051 | $1,860 | $1,571 |
| Change | +$547 | +$881 | +$775 | +$606 |
A typical rental in Groton costs $1,481 a month with utilities, below the national median of $1,571. Rents are up $547 a month from 2006–10, a 59% rise, a slower climb than the nation's. Rent takes 37.2% of the typical renter's income, well over the 30% mark often used to define affordable rent, so many renters here are stretched. Rents run highest in the west and lowest in the northeast.
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 | Boston area | Massachusetts | U.S. |
|---|---|---|---|---|
| 2006–10 | 68.3% | 42.2% | 38.5% | 28.4% |
| 2010–14 | 66.2% | 44.1% | 40.1% | 29.6% |
| 2015–19 | 64.5% | 48.2% | 43.6% | 32.1% |
| 2020–24 | 70.2% | 51.9% | 47.2% | 35.6% |
| Change | +1.9 pts | +9.7 pts | +8.7 pts | +7.2 pts |
Groton is highly educated: about seven in ten adults 25 and older (70.2%) hold at least a bachelor's degree, far above the national share of 35.6%. Since 2006–10, the share with a degree has risen 1.9 points, a smaller shift than nationally. College graduates are most concentrated in the southwest and least in the east.
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 | Boston area | Massachusetts | U.S. |
|---|---|---|---|---|
| 2006–10 | 97.5% | 89.8% | 88.4% | 84.9% |
| 2010–14 | 97.6% | 90.6% | 89.3% | 86.1% |
| 2015–19 | 97.1% | 91.5% | 90.5% | 87.7% |
| 2020–24 | 97.4% | 91.8% | 91.0% | 89.3% |
| Change | −0.1 pts | +2.1 pts | +2.6 pts | +4.3 pts |
Finishing high school is nearly universal in Groton: 97.4% of adults 25 and older have a diploma or equivalent, well above the national rate of 89.3%. Groton has a higher share of high school graduates than at least four in five Massachusetts cities.
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 | Boston area | Massachusetts | U.S. |
|---|---|---|---|---|
| 2006–10 | 4.5% | 7.0% | 7.5% | 8.1% |
| 2010–14 | 6.0% | 8.0% | 8.7% | 9.4% |
| 2015–19 | 3.4% | 4.6% | 5.0% | 5.6% |
| 2020–24 | 5.4% | 4.9% | 5.2% | 5.4% |
| Change | +0.8 pts | −2.1 pts | −2.3 pts | −2.7 pts |
At 5.4%, unemployment in Groton is the same as the national rate. Since 2006–10, unemployment has edged up 0.8 points, even as the national rate fell. Because the Census pools five years of responses (2020–24), these rates smooth over short swings and lag the current 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 | 2.94 | 42.5 | 6.6% | 11.7% | 3.7% | 1987 | $1,481 | 70.2% | 97.4% | 5.4% |
| Ayer | 2.31 | 40.5 | 13.1% | 30.6% | 7.6% | 1972 | $1,717 | 42.3% | 91.9% | 6.5% |
| Shirley Center | 2.70 | 46.1 | 11.7% | 20.6% | 7.5% | 1987 | $1,947 | 46.0% | 95.6% | 5.8% |
| Graniteville | 2.81 | 42.3 | 6.3% | 11.3% | 2.5% | 1990 | $2,789 | 74.4% | 97.9% | 1.8% |
| Pepperell | 2.75 | 44.6 | 7.9% | 15.3% | 5.2% | 1981 | $1,466 | 44.3% | 97.0% | 3.7% |
| Dunstable | 3.06 | 43.5 | 4.6% | 3.4% | 3.7% | 1986 | $1,334 | 61.5% | 94.8% | 5.1% |
| Townsend Harbor | 2.83 | 42.3 | 6.8% | 8.2% | 3.0% | 1986 | $2,247 | 52.9% | 97.4% | 3.1% |
| Littleton | 2.67 | 43.8 | 7.1% | 16.6% | 4.8% | 1977 | $2,012 | 58.2% | 95.5% | 5.7% |
| Westford | 2.84 | 43.8 | 7.1% | 14.2% | 6.2% | 1979 | $2,806 | 73.9% | 97.7% | 4.9% |
| Devens | 2.33 | 48.0 | 3.6% | 31.0% | 17.1% | 1952 | $1,421 | 18.9% | 76.0% | 4.2% |
| Shirley | 2.47 | 41.9 | 7.7% | 22.0% | 7.1% | 1970 | $1,594 | 37.3% | 89.0% | 4.6% |
All figures 2020–24.
Cities with similar populations: Swannanoa, NC · Carthage, NC · Carthage, TX · Wood-Ridge, NJ · Wonder Lake, IL · Wise, VA · Winters, CA · Wilmer, AL · Talent, OR · Talbott, TN
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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