Compare towns
Derby vs Killingly vs Rocky Hill
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 affordable homes ($257k median).
Killingly has the most kids (19.8% under 18).
Rocky Hill has the shortest commute (21 min average).
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 | Rocky Hill |
|---|---|---|---|
| Your priorities | |||
| People | |||
| Population | 12,487Lowest |
17,867 |
20,880Highest |
| 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 |
43.2±1.8 5% above CT |
| Derby and Rocky Hill 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%±2.3Highest CT: 20.2% |
16.8%±2.2 CT: 20.2% |
| Killingly and Rocky Hill are within the Census margin of error here, so we can’t say which is really higher. | |||
| Age 65+ | 21.1%±3.9 CT: 18.5% |
19.7%±2.4Lowest CT: 18.5% |
22.7%±2.8Highest CT: 18.5% |
| Rocky Hill and Derby 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% |
45.3%Highest CT: 42.5% |
| Enrolled in collegeshare of residents | 5.9%±2Highest CT: 7.1% |
5.4%±1.9 CT: 7.1% |
4.9%±1.4Lowest 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 | $79,500±$11kLowest 17% below CT |
$84,350±$8k 12% below CT |
$99,941±$9kHighest 4% above CT |
| Rocky Hill and Killingly are within the Census margin of error here, so we can’t say which is really higher. | |||
| Home valuemedian, owner-occupied | $256,700±$21kLowest 30% below CT |
$288,600±$15k 21% below CT |
$337,300±$17kHighest 8% below CT |
| Rentmedian gross, monthly | $1,452±$95 about the CT average |
$1,044±$141Lowest 30% below CT |
$1,783±$54Highest 20% above CT |
| Property taxmedian, yearly | $5,510 17% below CT |
$3,922Lowest 41% below CT |
$6,298Highest 5% below CT |
| Renters paying 30%+of income on rent | 53.9%±12.6Highest CT: 52.6% |
42.8%±10.9 CT: 52.6% |
33.6%±8Lowest 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% |
4.8%Lowest CT: 10% |
| Housing | |||
| Homeownersof occupied homes | 61.9%Lowest CT: 66.5% |
71.6%Highest CT: 66.5% |
68.3% CT: 66.5% |
| Typical home builtmedian year | 1967Lowest same as CT |
1968 1 yr newer than CT |
1979Highest 12 yrs newer than CT |
| Getting to work | |||
| Average commuteone way | 27 min about the CT average |
28 minHighest 5% above CT |
21 minLowest 22% below CT |
| Work from home | 15.1%±4.8 CT: 16% |
11.1%±2.3Lowest CT: 16% |
16%±2.6Highest CT: 16% |
| Rocky Hill and Derby 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 | #47 of 149 in CT |
| School district | Derby School District | Connecticut Technical Education and Career System · Eastern Connecticut Regional Educational Service Center (EAS | Capitol Region Education Council · Rocky Hill School District |
| High school in town | Derby High School | Killingly High School | Rocky Hill High School |
| Students per teacherat that high school | 9.7Lowest |
11.1 |
11.4Highest |
| On TownTapestry | |||
| Old photos in History | 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.