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 Moderate-density area
- $140,655
- Median income Above-median income area
- $446,200
- Median home value Above-median home value
- 55.4%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
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.
FHFA HPI release change
What changed in the latest House Price Index year
- FHFA House Price Index values in ZIP 06419 (Killingworth, CT) rose +10.7% from 2023 to 2024. The all-transactions index moved from 180.0 in 2023 to 199.2 in 2024 (2000 = 100).
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 average Connecticut ZIP), while per-capita income is $77,833. Both reported hardship measures are comparatively low in absolute terms: poverty is 3.0% and unemployment is 3.8%. Median home value is $446,200 (3% above the average Connecticut ZIP); 96.7% of occupied homes 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 -. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Middlesex County, so 06419 can be compared with both its immediate and county-level context.
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.
- Professional, scientific, and technical services
Professional, scientific, and technical services
23 establishments
- Construction
Construction
22 establishments
- Administrative and support and waste management and remediation services
Administrative and support and waste management and remediation services
12 establishments
- Health care and social assistance
Health care and social assistance
12 establishments
- Other services (except public administration)
Other services (except public administration)
11 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, 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
Who lives in ZIP 06419?
53.3
Median Age
50.0%
Male
50.0%
Female
0.7%
Foreign-Born
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 ZIP avg
$77,833
Per Capita Income
3.0%
Poverty Rate
3.8%
Unemployment Rate
How ZIP 06419 ranks among Connecticut ZIPs
Killingworth, CT household income vs. every Connecticut ZIP code
Median household income among 270 reporting Connecticut ZIPs (this ZIP's population is too small for a reliable national-corpus placement)
$140,655 Top 18% higher than 82% of 270 Connecticut ZIPs
Each bar is a $20K-wide band; taller bars hold more Connecticut 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?
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023)
What does housing look like?
Housing stock: occupied vs vacant
2,775housing units
2,775
Total Housing Units
2,516
Occupied Units
259
Vacant Units
2.48
Avg Household Size
Occupancy Type
$446,200
Median Home Value
+3% vs state ZIP avg
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.
- 06437
Guilford (06437)
22,375 residents
- 06443
Madison (06443)
18,269 residents
- 06413
Clinton (06413)
13,235 residents
- 06422 7,388
Durham (06422)
7,388 residents
- 06498 6,963
Westbrook (06498)
6,963 residents
- 06419 6,525
Killingworth (06419)
6,525 residents
- 06441 5,438
Higganum (06441)
5,438 residents
- 06417 4,629
Deep River (06417)
4,629 residents
- 06412 3,994
Chester (06412)
3,994 residents
What this shows Among its immediate neighbors, ZIP 06419 ranks #6 by population - useful context the national average alone can't give.
ZIP 06419 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 06443
Madison (06443)
$168,462 median income
- 06422
Durham (06422)
$158,857 median income
- 06419
Killingworth (06419)
$140,655 median income
- 06437
Guilford (06437)
$137,615 median income
- 06413
Clinton (06413)
$124,824 median income
- 06438
Haddam (06438)
$121,429 median income
- 06441
Higganum (06441)
$111,250 median income
- 06412
Chester (06412)
$109,191 median income
- 06442
Ivoryton (06442)
$104,358 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.
| 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 |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 06419, both outside CT so the neighborhoods are not geographic containment (Nearby and same-county blocks stay local).
Similar population
Nearest cross-state ZIPs by resident population (6,525 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Middlesex County
Related Areas
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.
Related
Take this with you
What to do with ZIP 06419's numbers, next.
- See how ZIP 06419 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where Killingworth, CT ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
- Save this ZIP to your shortlist to track alongside others you're considering View your shortlist
ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.