Compare towns
Derby vs Killingly vs Bethany
Cost, people, housing, commute and schools, side by side, each benchmarked against Connecticut.
What stands out worked out from the figures below
Derby has the most people working from home (15.1%).
Killingly has the youngest population (median age 39.5).
Bethany has the highest household income ($166k).
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 | Derby | Killingly | Bethany |
|---|---|---|---|
| Your priorities | |||
| People | |||
| Population | 12,487 |
17,867Highest |
5,288Lowest |
| Growth since 20102010 → 2020 census | -4.5% CT: +0.9% |
— | — |
| Median age | 46.4±3.1Highest 13% above CT |
39.5±3Lowest 4% below CT |
42.5±2.9 3% above CT |
| Derby and Bethany are within the Census margin of error here, so we can’t say which is really higher. | |||
| Kids under 18 | 14.6%±2.9Lowest CT: 20.2% |
19.8%±2.3 CT: 20.2% |
20.3%±5.9Highest CT: 20.2% |
| Bethany and Killingly are within the Census margin of error here, so we can’t say which is really higher. | |||
| Age 65+ | 21.1%±3.9Highest CT: 18.5% |
19.7%±2.4 CT: 18.5% |
17.2%±4.2Lowest 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+ | 35.6% CT: 42.5% |
22.9%Lowest CT: 42.5% |
58%Highest CT: 42.5% |
| Enrolled in collegeshare of residents | 5.9%±2 CT: 7.1% |
5.4%±1.9Lowest CT: 7.1% |
6.8%±3.7Highest CT: 7.1% |
| Bethany and Derby are within the Census margin of error here, so we can’t say which is really higher. | |||
| Cost of living | |||
| Household incomemedian | $79,500±$11kLowest 17% below CT |
$84,350±$8k 12% below CT |
$166,236±$20kHighest 74% above CT |
| Home valuemedian, owner-occupied | $256,700±$21kLowest 30% below CT |
$288,600±$15k 21% below CT |
$418,000±$42kHighest 14% above CT |
| Rentmedian gross, monthly | $1,452±$95Highest about the CT average |
$1,044±$141Lowest 30% below CT |
— |
| Property taxmedian, yearly | $5,510 17% below CT |
$3,922Lowest 41% below CT |
$8,313Highest 25% above CT |
| Renters paying 30%+of income on rent | 53.9%±12.6Highest CT: 52.6% |
42.8%±10.9 CT: 52.6% |
0%±100Lowest CT: 52.6% |
| Derby and Killingly are within the Census margin of error here, so we can’t say which is really higher. | |||
| Below poverty line | 10.8% CT: 10% |
11.4%Highest CT: 10% |
2.3%Lowest CT: 10% |
| Housing | |||
| Homeownersof occupied homes | 61.9%Lowest CT: 66.5% |
71.6% CT: 66.5% |
97.2%Highest CT: 66.5% |
| Typical home builtmedian year | 1967Lowest same as CT |
1968 1 yr newer than CT |
1970Highest 3 yrs newer than CT |
| Getting to work | |||
| Average commuteone way | 27 minLowest about the CT average |
28 min 5% above CT |
32 minHighest 21% above CT |
| Work from home | 15.1%±4.8Highest CT: 16% |
11.1%±2.3Lowest CT: 16% |
12%±5.2 CT: 16% |
| Derby and Bethany 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 | #138 of 149 in CT | #136 of 149 in CT | #30 of 149 in CT |
| School district | Derby School District | Connecticut Technical Education and Career System · Eastern Connecticut Regional Educational Service Center (EAS | Bethany School District · Regional School District 05 |
| High school in town | Derby High School | Killingly High School | None in town |
| Students per teacherat that high school | 9.7Lowest |
11.1Highest |
— |
| On TownTapestry | |||
| Old photos in History | None yet | None yet | None yet |
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.

