PlainZIP

East Haddam, CT · standard

ZIP Code 06423

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

5,097
51/sq mi
$107,549
Median income
$373,700
Median home value
39.4%
Bachelor's or higher

The verdict

East Haddam pairs an upper-quartile household income with upper-quartile home values, in a rural, homeowner-dominated area.

Top 15%
household income, US ZIPs
Top 23%
home value, US ZIPs
51
people per sq mi
96%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 06423 against every reporting US ZIP.

ZIP code 06423 is a mid-sized community (a standard USPS delivery area) in East Haddam, Middlesex County, Connecticut, home to 5,097 residents across 99.6 square miles, a density of 51 people per square mile, in the New York time zone.

ZIP 06423 lands in the middle-income range, with a median household income of $107,549 (5% below the Connecticut average), while per-capita income is $61,379. The poverty rate stands at 6.0% and the unemployment rate at 4.3%. On housing, the median home value is $373,700 (14% below the state average) with median rent at $1,663 per month, and 95.9% of occupied units are owner-occupied.

A solid share of residents have a four-year degree: 39.4% of adults hold a bachelor's degree or higher, the median age is 51.7, and the average commute is 33 minutes. A geography-based comparison follows: 10 ZIP codes within about 10 miles of 06423, plus 6 more within Middlesex County, give a clearer read than the national average alone.

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 06423

Top 5 sectors by establishment count in East Haddam, CT

Which industries have the most business establishments in ZIP 06423.

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 06423, East Haddam, 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

5,097

Population

99.6

Area (sq mi)

51

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 06423?

51.7

Median Age

51.9%

Male

48.1%

Female

3.0%

Foreign-Born

White 89.6%
African American 0.0%
Asian 0.7%
American Indian or Alaska Native 0.3%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 9.3%
Hispanic or Latino 4.9%

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?

$107,549

Median Household Income

-5% vs state

$61,379

Per Capita Income

6.0%

Poverty Rate

4.3%

Unemployment Rate

32.6 min

Mean Commute Time

How ZIP 06423 ranks nationally

East Haddam, CT household income vs. every US ZIP code

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

$107,549 Top 15% higher than 85% 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%). This entry sits in this band. $120,000–$140,000: 1,362 US ZIPs (4%). Above this entry. $140,000–$160,000: 686 US ZIPs (2%). Above this entry. $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 66.2%
Bachelor's Degree or Higher 39.4%

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

What does housing look like?

2,441

Total Housing Units

2,137

Occupied Units

304

Vacant Units

2.40

Avg Household Size

Occupancy Type

Owner 95.9%
Renter 4.1%

$373,700

Median Home Value

-14% vs state

$1,663

Median Rent

1979

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

+9.0%

YoY Change (2024)

202

HPI Index (2000 = 100)

+102%

Total Change Since 2000

Home values in ZIP 06423 have increased 9.0% over the past year (2024). Since 2000, this ZIP has seen +102% cumulative appreciation.

Year Annual Change HPI Index
2020 +3.7% 140
2021 +9.1% 152
2022 +10.7% 169
2023 +9.8% 185
2024 +9.0% 202

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 80 business establishments in ZIP 06423, employing approximately 525 people with a combined annual payroll of $32,378,000.

80

Businesses

525

Employees

$32.4M

Annual Payroll

11

Industry Sectors

Industry Establishments % of Total
Construction 14 17.5%
Other services (except public administration) 12 15.0%
Professional, scientific, and technical services 8 10.0%
Administrative and support and waste management and remediation services 7 8.8%
Retail trade 6 7.5%
Health care and social assistance 6 7.5%
Accommodation and food services 6 7.5%
Wholesale trade 4 5.0%
Transportation and warehousing 4 5.0%
Real estate and rental and leasing 4 5.0%
Arts, entertainment, and recreation 3 3.8%

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 06423 vs 06469 →

ZIP 06423 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 06423 ranks #3 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 06423 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 06423 ranks #7 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
06469 Moodus, CT 3,209 4.2 mi
06426 Essex, CT 3,245 7.9 mi
06438 Haddam, CT 2,550 6.0 mi
06415 Colchester, CT 16,857 6.6 mi
06420 Salem, CT 4,182 6.4 mi
06409 Centerbrook, CT 693 8.2 mi
06412 Chester, CT 3,994 6.5 mi
06371 Old Lyme, CT 9,952 7.8 mi
06417 Deep River, CT 4,629 7.8 mi
06442 Ivoryton, CT 2,745 9.1 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 East Haddam, CT Connecticut

Frequently Asked Questions

What county is ZIP code 06423 in? ▼
ZIP code 06423 (East Haddam) 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 06423? ▼
ZIP code 06423 in East Haddam, CT has a population of 5,097 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 06423? ▼
The median household income in ZIP 06423 is $107,549, which is 41% above the national average of $76,288.
What is the average home value in ZIP 06423? ▼
The median home value in ZIP 06423 is $373,700, which is 34% above the national average of $278,155.
What is the demographic makeup of ZIP 06423? ▼
The largest racial group in ZIP 06423 is White at 89.6%. Hispanic or Latino residents make up 4.9% of the population.
How many businesses are in ZIP code 06423? ▼
ZIP code 06423 has 80 business establishments employing approximately 525 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 06423? ▼
The top industries by establishment count in ZIP 06423 are: Construction (14), Other services (except public administration) (12), Professional, scientific, and technical services (8). There are 11 industry sectors represented in total.
How have home values changed in ZIP code 06423? ▼
According to the FHFA House Price Index, home values in ZIP 06423 increased by 9.0% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 102%. 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 06423? ▼
In ZIP code 06423, 66.2% of residents aged 25+ have a high school diploma or higher, and 39.4% hold a bachelor's degree or higher. These figures come from the Census Bureau ACS 5-Year Estimates (2023).
What is the average commute time in ZIP 06423? ▼
The mean commute time for workers in ZIP code 06423 is 32.6 minutes according to Census ACS data. The national average is roughly 26 minutes, so commuters here spend more time traveling to work than typical.
What percentage of residents own vs. rent in ZIP 06423? ▼
In ZIP code 06423, approximately 95.9% of occupied housing units are owner-occupied and 4.1% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 06423? ▼
The poverty rate in ZIP code 06423 is 6.0% 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.