PlainZIP

Killingworth, CT · standard

ZIP Code 06419

Middlesex County, Connecticut - Census ACS demographics, housing tenure, and business patterns, benchmarked against every US ZIP.

6,525
71/sq mi
$140,655
Median income
$446,200
Median home value
55.4%
Bachelor's or higher

The verdict

Killingworth pairs a top-decile household income with upper-quartile home values, in a rural, homeowner-dominated area.

Top 5%
household income, US ZIPs
Top 17%
home value, US ZIPs
71
people per sq mi
97%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 06419 against every reporting US ZIP.

ZIP code 06419 is a mid-sized community (a standard USPS delivery area) in Killingworth, Middlesex County, Connecticut, home to 6,525 residents across 91.5 square miles, a density of 71 people per square mile, in the New York time zone.

ZIP 06419 skews affluent, with a median household income of $140,655 (24% above the Connecticut average), while per-capita income is $77,833. 3.0% of residents live below the poverty line, and the unemployment rate reads 3.8%. The typical home here is valued at $446,200 (3% above the state average); renters pay a median of - monthly, and 96.7% of units are owner-occupied.

This is a highly-educated ZIP: 55.4% of adults hold a bachelor's degree or higher, the median age is 53.3, and the average commute is -. To put 06419 in local context, 10 ZIP codes within roughly 10 miles appear further down this page alongside 6 additional ZIPs in Middlesex County, for a geography-aware comparison.

Every figure on this page is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates (including median rent) and the FHFA House Price Index, no estimates, no proprietary scoring. Verify with Census →

Top industries in ZIP 06419

Top 5 sectors by establishment count in Killingworth, CT

Which industries have the most business establishments in ZIP 06419.

establishments

What this shows Establishment counts come from the Census ZIP Code Business Patterns program, which counts physical business locations rather than employees or revenue.

Source U.S. Census Bureau · ZIP Code Business Patterns (ZBP) As of 2023

Source: U.S. Census Bureau, American Community Survey 5-Year Estimates + ZIP Code Business Patterns + FHFA HPI ACS demographics and median rent, ZBP business establishments, FHFA HPI for ZIP 06419, Killingworth, CT · 2023 Census ACS 5-Year Estimates use a rolling 60-month sample for stable small-geography estimates; ZBP updated annually; FHFA HPI updated quarterly/annually.

Quick Facts

6,525

Population

91.5

Area (sq mi)

71

People / sq mi

New York

Time Zone

standard

ZIP Type

Neighborhood Scorecard
Get an A-F grade across income, safety, housing, rent, education, commute, and childcare for this ZIP code.
View Scorecard →

Who lives in ZIP 06419?

53.3

Median Age

50.0%

Male

50.0%

Female

0.7%

Foreign-Born

White 88.7%
African American 0.0%
Asian 0.4%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 10.1%
Hispanic or Latino 2.7%

Hispanic or Latino is an ethnicity category from the Census Bureau and may overlap with other categories above.

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How much do residents earn?

$140,655

Median Household Income

+24% vs state

$77,833

Per Capita Income

3.0%

Poverty Rate

3.8%

Unemployment Rate

How ZIP 06419 ranks nationally

Killingworth, CT household income vs. every US ZIP code

Median household income, the full national distribution, with this ZIP marked

$140,655 Top 5% higher than 95% of 30,318 US ZIPs

$0–$20,000: 118 US ZIPs (0%). Below this entry. $20,000–$40,000: 1,573 US ZIPs (5%). Below this entry. $40,000–$60,000: 7,092 US ZIPs (23%). Below this entry. $60,000–$80,000: 9,980 US ZIPs (33%). Below this entry. $80,000–$100,000: 5,778 US ZIPs (19%). Below this entry. $100,000–$120,000: 2,855 US ZIPs (9%). Below this entry. $120,000–$140,000: 1,362 US ZIPs (4%). Below this entry. $140,000–$160,000: 686 US ZIPs (2%). This entry sits in this band. $160,000–$180,000: 364 US ZIPs (1%). Above this entry. $180,000–$200,000: 186 US ZIPs (1%). Above this entry. $200,000–$220,000: 324 US ZIPs (1%). Above this entry. This ZIP $0 $200K+ every reporting US ZIP, bucketed by value

Each bar is a $20K-wide band; taller bars hold more US ZIPs. The dashed line + filled bar mark this entry. Hover or tap any bar for its full count, share, and where it sits relative to this entry.

Source U.S. Census Bureau, ACS 5-Year Estimates · 2019–2023

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What is the education profile here?

High School Graduate or Higher 77.2%
Bachelor's Degree or Higher 55.4%

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

What does housing look like?

2,775

Total Housing Units

2,516

Occupied Units

259

Vacant Units

2.48

Avg Household Size

Occupancy Type

Owner 96.7%
Renter 3.3%

$446,200

Median Home Value

+3% vs state

1987

Median Year Built

Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)

How have home values changed over time?

FHFA House Price Index, annual appreciation data based on repeat sales and appraisals

+10.7%

YoY Change (2024)

199

HPI Index (2000 = 100)

+99%

Total Change Since 2000

Home values in ZIP 06419 have increased 10.7% over the past year (2024). Since 2000, this ZIP has seen +99% cumulative appreciation.

Year Annual Change HPI Index
2020 +1.6% 132
2021 +12.5% 148
2022 +14.3% 169
2023 +6.2% 180
2024 +10.7% 199

Source: Federal Housing Finance Agency (FHFA) House Price Index, All-Transactions, Five-Digit ZIP Codes (Developmental Index). Index base = 100 in year 2000. Data through 2024. ZIP codes with few transactions may show missing values.

What businesses operate in this ZIP?

Census Bureau data shows 119 business establishments in ZIP 06419, employing approximately 722 people with a combined annual payroll of $39,342,000.

119

Businesses

722

Employees

$39.3M

Annual Payroll

11

Industry Sectors

Industry Establishments % of Total
Professional, scientific, and technical services 23 19.3%
Construction 22 18.5%
Administrative and support and waste management and remediation services 12 10.1%
Health care and social assistance 12 10.1%
Other services (except public administration) 11 9.2%
Accommodation and food services 9 7.6%
Retail trade 8 6.7%
Educational services 4 3.4%
Wholesale trade 3 2.5%
Transportation and warehousing 3 2.5%
Finance and insurance 3 2.5%

Source: U.S. Census Bureau, ZIP Code Business Patterns (ZBP), 2023. Employment figures may include noise for disclosure avoidance.

Nearby ZIP Codes

Want a side-by-side? Compare 06419 vs 06441 →

ZIP 06419 vs its nearest neighbors, by population

Resident population of this ZIP and the closest reporting ZIP codes within ~10 miles.

residents

What this shows Among its immediate neighbors, ZIP 06419 ranks #6 by population - useful context the national average alone can't give.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023

ZIP 06419 vs its nearest neighbors, by median income

Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.

median income

What this shows By household income, ZIP 06419 ranks #3 of 9 neighboring ZIPs, local affluence varies block to block, not just metro to metro.

Source U.S. Census Bureau · ACS 5-Year Estimates As of 2019–2023
ZIP Code City Population Distance
06441 Higganum, CT 5,438 5.9 mi
06443 Madison, CT 18,269 3.7 mi
06412 Chester, CT 3,994 5.3 mi
06417 Deep River, CT 4,629 6.1 mi
06413 Clinton, CT 13,235 6.1 mi
06438 Haddam, CT 2,550 6.6 mi
06437 Guilford, CT 22,375 7.0 mi
06442 Ivoryton, CT 2,745 7.3 mi
06498 Westbrook, CT 6,963 7.7 mi
06422 Durham, CT 7,388 7.9 mi

More ZIP Codes in Middlesex County

06457 standard
Middletown, CT
Pop: 47,648
06416 standard
Cromwell, CT
Pop: 14,005
06413 standard
Clinton, CT
Pop: 13,235
06424 standard
East Hampton, CT
Pop: 12,808
06475 standard
Old Saybrook, CT
Pop: 10,242
06480 standard
Portland, CT
Pop: 9,508

Related Areas

Middlesex County Killingworth, CT Connecticut

Frequently Asked Questions

What county is ZIP code 06419 in? ▼
ZIP code 06419 (Killingworth) is located in Middlesex County, Connecticut. Middlesex County contains multiple ZIP codes, see the full list at /counties/middlesex-ct.
What is the population of ZIP code 06419? ▼
ZIP code 06419 in Killingworth, CT has a population of 6,525 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 06419? ▼
The median household income in ZIP 06419 is $140,655, which is 84% above the national average of $76,288.
What is the average home value in ZIP 06419? ▼
The median home value in ZIP 06419 is $446,200, which is 60% above the national average of $278,155.
What is the demographic makeup of ZIP 06419? ▼
The largest racial group in ZIP 06419 is White at 88.7%. Hispanic or Latino residents make up 2.7% of the population.
How many businesses are in ZIP code 06419? ▼
ZIP code 06419 has 119 business establishments employing approximately 722 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 06419? ▼
The top industries by establishment count in ZIP 06419 are: Professional, scientific, and technical services (23), Construction (22), Administrative and support and waste management and remediation services (12). There are 11 industry sectors represented in total.
How have home values changed in ZIP code 06419? ▼
According to the FHFA House Price Index, home values in ZIP 06419 increased by 10.7% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 99%. This is a developmental index based on repeat sales and appraisal data from Fannie Mae and Freddie Mac.
What is the education level in ZIP code 06419? ▼
In ZIP code 06419, 77.2% of residents aged 25+ have a high school diploma or higher, and 55.4% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What percentage of residents own vs. rent in ZIP 06419? ▼
In ZIP code 06419, approximately 96.7% of occupied housing units are owner-occupied and 3.3% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 06419? ▼
The poverty rate in ZIP code 06419 is 3.0% according to Census Bureau ACS 2023 estimates. This measures the percentage of the population living below the federal poverty threshold.

Read our methodology to see how this data is sourced, computed, and verified.