What stands out worked out from the figures below

Killingly has the most affordable homes ($289k median).

Groton has the most expensive homes ($743k median).

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.

Raising kidsAffordabilityOwning a homeShort commuteWorking from homeYounger crowdSettled, older crowdGrowing town

Measure	Killingly	Groton
People
Population	17,867Highest	11,390Lowest
Growth since 20102010 → 2020 census	—	+6.3% U.S.: +7.4%
Median age	39.5±3Lowest about the U.S. average	41.4±2.7Highest 6% above U.S.
	Groton and Killingly are within the Census margin of error here, so we can’t say which is really higher.
Kids under 18	19.8%±2.3Lowest U.S.: 22%	28.3%±4.9Highest U.S.: 22%
Age 65+	19.7%±2.4Highest U.S.: 17.2%	17.3%±2.8Lowest U.S.: 17.2%
	Killingly and Groton are within the Census margin of error here, so we can’t say which is really higher.
Bachelor’s degree+adults 25+	22.9%Lowest U.S.: 35.7%	70.1%Highest U.S.: 35.7%
Enrolled in collegeshare of residents	5.4%±1.9Lowest U.S.: 6.4%	5.6%±1.9Highest U.S.: 6.4%
	Groton and Killingly are within the Census margin of error here, so we can’t say which is really higher.
Cost of living
Household incomemedian	$84,350±$8kLowest 4% above U.S.	$192,958±$27kHighest 139% above U.S.
Home valuemedian, owner-occupied	$288,600±$15kLowest 13% below U.S.	$743,400±$46kHighest 123% above U.S.
Rentmedian gross, monthly	$1,044±$141Lowest 26% below U.S.	$1,458±$335Highest 3% above U.S.
	Groton and Killingly are within the Census margin of error here, so we can’t say which is really higher.
Property taxmedian, yearly	$3,922Lowest 26% above U.S.	$10,000+Highest at least 221% above U.S.
Renters paying 30%+of income on rent	42.8%±10.9Lowest U.S.: 51.1%	43.8%±17Highest U.S.: 51.1%
	Groton and Killingly are within the Census margin of error here, so we can’t say which is really higher.
Below poverty line	11.4%Highest U.S.: 12.5%	3.8%Lowest U.S.: 12.5%
Housing
Homeownersof occupied homes	71.6%Lowest U.S.: 65.2%	88.8%Highest U.S.: 65.2%
Typical home builtmedian year	1968Lowest 12 yrs older than U.S.	1988Highest 8 yrs newer than U.S.
Getting to work
Average commuteone way	28 minLowest 6% above U.S.	32 minHighest 22% above U.S.
Work from home	11.1%±2.3Lowest U.S.: 15.1%	27.5%±5.8Highest U.S.: 15.1%
Schools
Public school scoresrank in state, math + reading	#136 of 149 in CT	#39 of 282 in MA
School district	Connecticut Technical Education and Career System · Eastern Connecticut Regional Educational Service Center (EAS	Groton-Dunstable
High school in town	Killingly High School	Groton Dunstable Regional
Students per teacherat that high school	11.1Lowest	13.7Highest
On TownTapestry
Old photos in History	None yet	None yet

U.S. 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.