PlainZIP

Stonington, CT · standard

ZIP Code 06378

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

5,399
98/sq mi
$135,714
Median income
$593,400
Median home value
61.2%
Bachelor's or higher

The verdict

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

Top 6%
household income, US ZIPs
Top 9%
home value, US ZIPs
98
people per sq mi
78%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 06378 against every reporting US ZIP.

ZIP code 06378 is a mid-sized community (a standard USPS delivery area) in Stonington, New London County, Connecticut, home to 5,399 residents across 55.0 square miles, a density of 98 people per square mile, in the New York time zone.

ZIP 06378 skews affluent, with a median household income of $135,714 (20% above the Connecticut average), while per-capita income is $96,042. Local economic indicators show a 2.9% poverty rate alongside 4.4% unemployment. The typical home here is valued at $593,400 (37% above the state average); renters pay a median of $1,750 monthly, and 77.8% of units are owner-occupied.

This is a highly-educated ZIP: 61.2% of adults hold a bachelor's degree or higher, the median age is 58.7, and the average commute is 27 minutes. To put 06378 in local context, 10 ZIP codes within roughly 10 miles appear further down this page alongside 6 additional ZIPs in New London 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 06378

Top 5 sectors by establishment count in Stonington, CT

Which industries have the most business establishments in ZIP 06378.

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 06378, Stonington, 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

5,399

Population

55.0

Area (sq mi)

98

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 06378?

58.7

Median Age

51.1%

Male

48.9%

Female

4.0%

Foreign-Born

White 93.7%
African American 2.0%
Asian 0.1%
American Indian or Alaska Native 0.1%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 3.9%
Hispanic or Latino 2.4%

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?

$135,714

Median Household Income

+20% vs state

$96,042

Per Capita Income

2.9%

Poverty Rate

4.4%

Unemployment Rate

26.7 min

Mean Commute Time

How ZIP 06378 ranks nationally

Stonington, CT household income vs. every US ZIP code

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

$135,714 Top 6% higher than 94% 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%). This entry sits in this band. $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 72.3%
Bachelor's Degree or Higher 61.2%

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

What does housing look like?

3,297

Total Housing Units

2,708

Occupied Units

589

Vacant Units

2.05

Avg Household Size

Occupancy Type

Owner 77.8%
Renter 22.2%

$593,400

Median Home Value

+37% vs state

$1,750

Median Rent

1969

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

+0.5%

YoY Change (2024)

259

HPI Index (2000 = 100)

+159%

Total Change Since 2000

Home values in ZIP 06378 have increased 0.5% over the past year (2024). Since 2000, this ZIP has seen +159% cumulative appreciation.

Year Annual Change HPI Index
2020 -0.4% 162
2021 +18.0% 192
2022 +17.5% 225
2023 +14.7% 258
2024 +0.5% 259

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 162 business establishments in ZIP 06378, employing approximately 1,228 people with a combined annual payroll of $77,152,000.

162

Businesses

1,228

Employees

$77.2M

Annual Payroll

14

Industry Sectors

Industry Establishments % of Total
Retail trade 19 11.7%
Professional, scientific, and technical services 18 11.1%
Other services (except public administration) 18 11.1%
Construction 17 10.5%
Accommodation and food services 16 9.9%
Manufacturing 12 7.4%
Arts, entertainment, and recreation 12 7.4%
Administrative and support and waste management and remediation services 11 6.8%
Health care and social assistance 8 4.9%
Information 7 4.3%
Real estate and rental and leasing 7 4.3%
Wholesale trade 6 3.7%
Finance and insurance 4 2.5%
Educational services 3 1.9%

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 06378 vs 06379 →

ZIP 06378 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 06378 ranks #7 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 06378 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 06378 ranks #2 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
06379 Pawcatuck, CT 9,038 3.1 mi
06355 Mystic, CT 12,985 3.2 mi
06359 North Stonington, CT 5,313 6.5 mi
02891 Westerly, RI 21,198 6.4 mi
06339 Ledyard, CT 8,302 6.1 mi
06340 Groton, CT 31,242 7.0 mi
06390 Fishers Island, NY 236 8.5 mi
02804 Ashaway, RI 2,607 8.2 mi
06335 Gales Ferry, CT 6,729 8.4 mi
06365 Preston, CT 4,720 10.8 mi

More ZIP Codes in New London County

06360 standard
Norwich, CT
Pop: 37,541
06340 standard
Groton, CT
Pop: 31,242
06320 standard
New London, CT
Pop: 27,617
06415 standard
Colchester, CT
Pop: 16,857
06351 standard
Jewett City, CT
Pop: 16,301
06385 standard
Waterford, CT
Pop: 15,893

Related Areas

New London County Stonington, CT Connecticut

Frequently Asked Questions

What county is ZIP code 06378 in? ▼
ZIP code 06378 (Stonington) is located in New London County, Connecticut. New London County contains multiple ZIP codes, see the full list at /counties/new-london-ct.
What is the population of ZIP code 06378? ▼
ZIP code 06378 in Stonington, CT has a population of 5,399 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 06378? ▼
The median household income in ZIP 06378 is $135,714, which is 78% above the national average of $76,288.
What is the average home value in ZIP 06378? ▼
The median home value in ZIP 06378 is $593,400, which is 113% above the national average of $278,155.
What is the demographic makeup of ZIP 06378? ▼
The largest racial group in ZIP 06378 is White at 93.7%. Hispanic or Latino residents make up 2.4% of the population.
How many businesses are in ZIP code 06378? ▼
ZIP code 06378 has 162 business establishments employing approximately 1,228 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 06378? ▼
The top industries by establishment count in ZIP 06378 are: Retail trade (19), Professional, scientific, and technical services (18), Other services (except public administration) (18). There are 14 industry sectors represented in total.
How have home values changed in ZIP code 06378? ▼
According to the FHFA House Price Index, home values in ZIP 06378 increased by 0.5% in 2024. Since 2000, home values in this ZIP have appreciated by approximately 159%. 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 06378? ▼
In ZIP code 06378, 72.3% of residents aged 25+ have a high school diploma or higher, and 61.2% 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 06378? ▼
The mean commute time for workers in ZIP code 06378 is 26.7 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 06378? ▼
In ZIP code 06378, approximately 77.8% of occupied housing units are owner-occupied and 22.2% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 06378? ▼
The poverty rate in ZIP code 06378 is 2.9% 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.