Compare towns
Griswold vs Derby vs Killingly vs Plymouth
Cost, people, housing, commute and schools, side by side, each benchmarked against Connecticut.
What stands out worked out from the figures below
Griswold has the oldest population (median age 48.1).
Derby has the most renters (38.1% rent).
Killingly has the youngest population (median age 39.5).
Plymouth has the highest household income ($95k).
What matters to you?
Pick a few. We’ll pull those rows to the top and mark which town comes out ahead on each. There’s no overall score: what matters is up to you.
| Measure | Griswold | Derby | Killingly | Plymouth |
|---|---|---|---|---|
| Your priorities | ||||
| People | ||||
| Population | 11,530Lowest |
12,487 |
17,867Highest |
11,746 |
| Growth since 20102010 → 2020 census | — | -4.5% CT: +0.9% |
— | — |
| Median age | 48.1±3.9Highest 17% above CT |
46.4±3.1 13% above CT |
39.5±3Lowest 4% below CT |
44.6±2.8 9% above CT |
| Griswold and Derby are within the Census margin of error here, so we can’t say which is really higher. | ||||
| Kids under 18 | 18.5%±3.7 CT: 20.2% |
14.6%±2.9Lowest CT: 20.2% |
19.8%±2.3Highest CT: 20.2% |
17.6%±2.5 CT: 20.2% |
| Killingly and Griswold are within the Census margin of error here, so we can’t say which is really higher. | ||||
| Age 65+ | 17.8%±3.5Lowest CT: 18.5% |
21.1%±3.9Highest CT: 18.5% |
19.7%±2.4 CT: 18.5% |
18.9%±2.4 CT: 18.5% |
| Derby and Killingly are within the Census margin of error here, so we can’t say which is really higher. | ||||
| Bachelor’s degree+adults 25+ | 19.9%Lowest CT: 42.5% |
35.6%Highest CT: 42.5% |
22.9% CT: 42.5% |
29.3% CT: 42.5% |
| Enrolled in collegeshare of residents | 1.8%±1.1Lowest CT: 7.1% |
5.9%±2Highest CT: 7.1% |
5.4%±1.9 CT: 7.1% |
4.7%±1.6 CT: 7.1% |
| Derby and Killingly are within the Census margin of error here, so we can’t say which is really higher. | ||||
| Cost of living | ||||
| Household incomemedian | $78,719±$11kLowest 18% below CT |
$79,500±$11k 17% below CT |
$84,350±$8k 12% below CT |
$94,514±$14kHighest about the CT average |
| Plymouth and Killingly are within the Census margin of error here, so we can’t say which is really higher. | ||||
| Home valuemedian, owner-occupied | $275,900±$42k 25% below CT |
$256,700±$21kLowest 30% below CT |
$288,600±$15kHighest 21% below CT |
$275,000±$14k 25% below CT |
| Killingly and Griswold are within the Census margin of error here, so we can’t say which is really higher. | ||||
| Rentmedian gross, monthly | $1,177±$65 21% below CT |
$1,452±$95Highest about the CT average |
$1,044±$141Lowest 30% below CT |
$1,276±$132 14% below CT |
| Derby and Plymouth are within the Census margin of error here, so we can’t say which is really higher. | ||||
| Property taxmedian, yearly | $4,628 30% below CT |
$5,510 17% below CT |
$3,922Lowest 41% below CT |
$5,819Highest 12% below CT |
| Renters paying 30%+of income on rent | 57.5%±15.5 CT: 52.6% |
53.9%±12.6 CT: 52.6% |
42.8%±10.9Lowest CT: 52.6% |
57.9%±26.1Highest CT: 52.6% |
| Plymouth and Griswold are within the Census margin of error here, so we can’t say which is really higher. | ||||
| Below poverty line | 7.6%Lowest CT: 10% |
10.8% CT: 10% |
11.4%Highest CT: 10% |
8.5% CT: 10% |
| Housing | ||||
| Homeownersof occupied homes | 73.3% CT: 66.5% |
61.9%Lowest CT: 66.5% |
71.6% CT: 66.5% |
76.7%Highest CT: 66.5% |
| Typical home builtmedian year | 1977Highest 10 yrs newer than CT |
1967 same as CT |
1968 1 yr newer than CT |
1965Lowest 2 yrs older than CT |
| Getting to work | ||||
| Average commuteone way | 31 minHighest 17% above CT |
27 minLowest about the CT average |
28 min 5% above CT |
29 min 8% above CT |
| Work from home | 9%±3.6Lowest CT: 16% |
15.1%±4.8Highest CT: 16% |
11.1%±2.3 CT: 16% |
13.4%±5.1 CT: 16% |
| Derby and Plymouth are within the Census margin of error here, so we can’t say which is really higher. | ||||
| Schools | ||||
| Public school scoresrank in state, math + reading | #118 of 149 in CT | #138 of 149 in CT | #136 of 149 in CT | #86 of 149 in CT |
| School district | Griswold School District | Derby School District | Connecticut Technical Education and Career System · Eastern Connecticut Regional Educational Service Center (EAS | Plymouth School District |
| High school in town | Griswold High School | Derby High School | Killingly High School | Terryville High School |
| Students per teacherat that high school | 11.5Highest |
9.7Lowest |
11.1 |
10.7 |
| On TownTapestry | ||||
| Old photos in History | None yet | None yet | None yet | 6 photos → |
CT average · Sources: U.S. Census Bureau, American Community Survey 5-year estimates 2020–2024; 2010 & 2020 decennial census; NCES Common Core of Data. “±” is the Census margin of error. Property tax is top-coded by the Census at $10,000+. School rank compares math and reading proficiency against the state average.