Killingworth Flag

Killingworth

County Seat:
No
Area (mi²):
35.331
State:
Connecticut

Killingworth is located in Lower Connecticut River Valley Planning Region, Connecticut. Killingworth has a 2026 population of 6,312. Killingworth is currently growing at a rate of 0.22% annually and its population has increased by 2.43% since the most recent census, which recorded a population of 6,162 in 2020.

The median household income in Killingworth is $140,655 with a poverty rate of 2.98%. The median age in Killingworth is 53.3 years: 53.3 years for males, and 54.1 years for females. For every 100 females there are 99.9 males.

6.3K
Total Population
179
Density (mi²)
14 0.22%
Growth

Killingworth Population

Killingworth Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
20266,312140.22%
20256,298140.22%
20246,284140.22%
20236,270220.35%
20226,248200.32%
20216,228661.07%
20206,162-10-0.16%
20196,371-12-0.19%
20186,383-6-0.09%
20176,389-21-0.33%
20166,410-26-0.4%
20156,436-42-0.65%
20146,478-9-0.14%
20136,487-5-0.08%
20126,492-33-0.51%
20116,52500%
20106,519-6-0.09%

Median Age

Overall: 53.3 years
Female: 54.1 years
Male: 53.3 years

Killingworth Adults

There are 5,076 adults, (1,594 of whom are seniors) in Killingworth.

Sex Ratio

Female: 3,122 (50%)
Male: 3,118 (50%)

Demographics

The racial composition of Killingworth includes 88.69% White, and smaller percentages for other race, Asian and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White5,53488.69%
Two or more races63310.14%
Other race500.8%
Asian230.37%
Race
Population ↓
Percentage (of total)
Two or more races1021.63%
White600.96%
Other race70.11%
Race
Population ↓
Percentage (of total)
White5,47487.72%
Two or more races5318.51%
Other race430.69%
Asian230.37%

Killingworth Marital Status

Economics and Income Statistics

Killingworth 's average per capita income is $86,870. Household income levels show a median of $140,655. The poverty rate stands at 2.98%.

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$165,156-
Families$160,057$229,100
Households$140,655$195,835
Non Families$46,441$78,838

$86,870

Average Income

$140,655

Median Household Income

2.98%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)