Killingworth, CT demographics:
population, income, and more

Total population
6,238
0.3% year-over-year change
Median household income
$140,655/yr
6.0% year-over-year change
Housing units
2,774
2.3% year-over-year change

Killingworth population

How many people live in Killingworth

Killingworth is home to 6,238 residents, according to the most recent Census data. Gender-wise, 50% of Killingworth locals are male, and 50% are female.

Total population
6,238
0.3% year-over-year change
Gender ratio
Male
50%
3,117
Female
50%
3,121
Value Percent YoY change
Male 3,117 50% 2.4%
Female 3,121 50% -1.6%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Killingworth is 53, with the population distributed as follows: about 15.3% are children under 15, then 8.7% are in the 15 to 24 age group. Adults between 25 and 44 make up 15.2% of the population, while another 35.3% fall into the 45 to 64 bracket. Finally, around 25.6% are 65 or older.

Median age
53.3
Age breakdown
Under 15
15.3%
15 to 24
8.7%
25 to 44
15.2%
45 to 64
35.3%
Over 65
25.6%
Value Percent YoY change
Under 15 955 15.3% 3.6%
15 to 24 542 8.7% -19.6%
25 to 44 947 15.2% -0.5%
45 to 64 2,201 35.3% -1.5%
Over 65 1,594 25.6% 11.0%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Killingworth, 97.8% of the population are US-born citizens, while 2.2% have gained naturalized citizenship. There’s also a share of 10.2% that includes residents with two or more races.

Citizenship
U.S.-born citizens
97.8%
Non-U.S.-born citizens
2.2%
Non-citizens
0%
Value Percent YoY change
U.S.-born citizens 6,102 97.8% 0.5%
Non-U.S.-born citizens 136 2.2% -6.2%
Racial breakdown
White
88.7%
Black or African American
0%
American Indian and Alaska Native
0%
Asian
0.4%
Native Hawaiian and other Pacific Islander
0%
Two or more races
10.2%
Other
0.8%
Value Percent
White 5,532 88.7%
Asian 23 0.4%
Two or more races 633 10.2%
Other 50 0.8%

Households in Killingworth

A peek inside Killingworth households

Killingworth has 2,515 households, with an average of 2 members in each. Of these, 77.5% are families, while the remaining 22.5% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
2,515
3.8% year-over-year change
Average people per household
2
Non-family households
566
Family households
1,949
Value Percent YoY change
Non-family households 566 22.5% -3.7%
Family households 1,949 77.5% 6.2%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Killingworth

The housing landscape of Killingworth

Killingworth's housing consists of 2,774 units, with 92.2% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 1.7% and offer a more compact, shared living style. Then there are the multifamily buildings in the area, and for those seeking flexibility, non-traditional options like mobile homes account for 5.7% of the housing landscape.

Housing units
2,774
2.3% year-over-year change
Housing types
Value Percent
1 unit, detached 2,557 92.2%
1 unit, attached 48 1.7%
10 to 19 units 12 0.4%
Mobile home 157 5.7%
Homes built since 2020
% year-over-year change

The age of buildings in Killingworth

In Killingworth, the median construction year is 1987. About 6.4% of homes were built before the 1940s, with another 4% going up by 1949. Most development happened in the second half of the 20th century.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 179 6.4% 23.4%
Built between 1940 and 1949 112 4% -0.9%
Built between 1950 and 1959 339 12.2% 14.5%
Built between 1960 and 1969 103 3.7% -37.6%
Built between 1970 and 1979 413 14.9% -15.5%
Built between 1980 and 1989 344 12.4% 12.4%
Built between 1990 and 1999 660 23.8% 4.1%
Built between 2000 and 2009 409 14.7% 21.4%
Built between 2010 and 2019 216 7.8% -5.3%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Killingworth occupancy rates

Out of the 2,515 occupied housing units in Killingworth, 96.7% are owner-occupied, while 3.3% are lived in by tenants. Meanwhile, 9.3% of all homes on the local market sit vacant.

Occupied housing units
2,515
3.8% year-over-year change
Occupancy breakdown
Renter occupied
82
Owner occupied
2,433
Value Percent YoY
change
Renter occupied 82 3.3% 645.5%
Owner occupied 2,433 96.7% 0.8%
Unoccupied housing units
9.3%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Killingworth housing costs

Median housing costs per month
$2,150/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.

Education in Killingworth

Killingworth education at a glance

About 24.9% of the population in Killingworth went to high school, while 17.6% pursued college studies. Another 4.2% earned an associate degree and 27% hold a bachelor’s. Meanwhile, 26% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 15 0.3% 7.1%
High school diploma 1,266 24.9% -6.5%
College diploma 892 17.6% -9.3%
Associate degree 213 4.2% -12.7%
Bachelor's degree 1,368 27% 3.4%
Graduate degree 1,322 26% 11.2%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Killingworth

How much people earn in Killingworth

The average annual household income in Killingworth was $195,795 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a -0.1% change from the previous year. At the same time, the median income stood at $140,655, reflecting a +6% shift over the same period.

Average household income in Killingworth
$195,795/year
-0.1% year-over-year change
Median household income in Killingworth
$140,655/year
6.0% year-over-year change

Killingworth income by age

In Killingworth, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $160,735. Those with someone between 45 and 64 in charge, often well established professionally, earn $165,156 overall. Overall, 97% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $160,735 11.8%
45 - 64 $165,156 16.8%
Over 65 $96,373 3.1%
Above poverty level
5,932
Below poverty level
186
Value Percent YoY
change
Above poverty level 5,932 97% 1.1%
Below poverty level 186 3% -18.8%

Employment in Killingworth

Workforce and job types in Killingworth

82.8% of the working population are employed in professional or administrative positions, while 17.2% are in hands-on or service-based jobs. Also, 21.4% run their own businesses, 54.3% are employed by private companies, and 13.7% work in the public sector.

Workforce demographics

White collar
2,446
Blue collar
509
Value Percent YoY change
White collar 2,446 82.8% 1.1%
Blue collar 509 17.2% -10.1%
Employer type
Self employees
21.4%
Private companies
54.3%
Governmental workers
13.7%
Not for profit companies
10.6%
Value Percent YoY change
Self employees 634 21.4% 16.1%
Private companies 1,606 54.3% 0.0%
Governmental workers 404 13.7% -22.3%
Not for profit companies 312 10.6% -0.9%

Transportation in Killingworth

How people get around in Killingworth

Means of transportation
Value Percent YoY change
Car 2,093 100% -6.2%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Killingworth by zipcode?

Zipcode Population Number of households Median income Average income
06419 6,240 2,516 $140,655 $195,835

Explore more communities

FAQs about Killingworth demographics 

What is the total population of Killingworth?

Killingworth has a total population of 6,238 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +0.3% compared to a year ago.

What is the gender ratio in Killingworth?

The gender ratio in Killingworth is as follows:
  • 50% males (3,117 residents)
  • 50% females (3,121 residents)

What is the median age in Killingworth?

The median age in Killingworth is 53.3.

What is the age distribution of the population in Killingworth?

The age distribution in Killingworth is as follows:
  • Under 15: 15.3% (955 residents)
  • Ages 15-24: 8.7% (542 residents)
  • Ages 25-44: 15.2% (947 residents)
  • Ages 45-64: 35.3% (2,201 residents)
  • Over 65: 25.6% (1,594 residents)

What is the racial and ethnic makeup of Killingworth?

The racial and ethnic makeup of Killingworth is as follows:
  • White: 88.7% (5,532 residents)
  • Black or African American: 0% ( residents)
  • American Indian and Alaska Native: 0% ( residents)
  • Asian: 0.4% (23 residents)
  • Native Hawaiian and Other Pacific Islander: 0% ( residents)
  • Two or More Races: 10.2% (633 residents)
  • Other: 0.8% (50 residents)

What percentage of the population in Killingworth are U.S.-born citizens?

U.S.-born citizens represent 97.8% of the population in Killingworth.

How many housing units are there in Killingworth?

There are 2,774 housing units in Killingworth, reflecting a +2.3% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Killingworth and what is the average household size?

Killingworth has a total of 2,515 households, with an average of 2 people in each.

What is the median household income in Killingworth?

Killingworth has a median household income of $140,655, representing a +6.0% shift from the previous year, according to the U.S. Census Bureau.

What is the job market overview for Killingworth?

Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 82.8% (2,446 residents)
  • Blue-collar workers: 17.2% (509 residents)

Places of employment:
  • Self-employed: 21.4% (634 residents)
  • Private companies: 54.3% (1,606 residents)
  • Governmental workers: 13.7% (404 residents)
  • Not-for-profit companies: 10.6% (312 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025