Killingworth

County:: Lower CT River Valley Planning Region
County Seat:: No
Area (mi²):: 35.331
State:: Connecticut

Killingworth is located in Lower CT River Valley Planning Region, Connecticut. Killingworth has a 2025 population of 6,284. Killingworth is currently growing at a rate of 0.24% annually and its population has increased by 2.01% since the most recent census, which recorded a population of 6,160 in 2020.

The average household income in Killingworth is $196,107 with a poverty rate of 3.68%.The median age in Killingworth is 51.8 years: 51.9 years for males, and 51.8 years for females.

Demographics

The racial composition of Killingworth includes 88.99% White, and smaller percentages for Asian, other race and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	5,534	88.99%
Two or more races	573	9.21%
Asian	59	0.95%
Other race	53	0.85%

Killingworth Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Killingworth's average per capita income is $82,635. Household income levels show a median of $132,739. The poverty rate stands at 3.68%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$148,861	-
Families	$147,972	$237,696
Households	$132,739	$196,107
Non Families	$45,769	$65,746

$82,635

Average Income

$132,739

Median Household Income

3.68%

Poverty Rate