PlainZIP

New Canaan, CT · standard

ZIP Code 06840

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

19,738
343/sq mi
$250,001
Median income
$1,611,900
Median home value
82.5%
Bachelor's or higher

The verdict

New Canaan pairs a top-decile household income with top-decile home values, in a low-density, homeowner-dominated area.

Top 1%
household income, US ZIPs
Top 1%
home value, US ZIPs
343
people per sq mi
84%
owner-occupied homes

Source: U.S. Census Bureau ACS 5-Year Estimates (2019–2023). Percentiles rank ZIP 06840 against every reporting US ZIP.

ZIP code 06840 is a mid-sized community (a standard USPS delivery area) in New Canaan, Fairfield County, Connecticut, home to 19,738 residents across 57.5 square miles, a density of 343 people per square mile, in the New York time zone.

ZIP 06840 skews affluent, with a median household income of $250,001 (121% above the Connecticut average), while per-capita income is $143,695. The poverty rate stands at 3.7% and the unemployment rate at 5.2%. Housing costs here run $1,611,900 for a typical home value (271% above the state average), with rent averaging $3,401 a month; 83.7% of homes are owner-occupied.

This is a highly-educated ZIP: 82.5% of adults hold a bachelor's degree or higher, the median age is 42.1, and the average commute is 38 minutes. A geography-based comparison follows: 10 ZIP codes within about 10 miles of 06840, plus 6 more within Fairfield 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 06840

Top 5 sectors by establishment count in New Canaan, CT

Which industries have the most business establishments in ZIP 06840.

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 06840, New Canaan, 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

19,738

Population

57.5

Area (sq mi)

343

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 06840?

42.1

Median Age

47.0%

Male

53.0%

Female

15.6%

Foreign-Born

White 81.8%
African American 1.7%
Asian 5.4%
American Indian or Alaska Native 0.0%
Native Hawaiian or Pacific Islander 0.0%
Two or More Ethnicities 8.5%
Hispanic or Latino 6.3%

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?

$250,001

Median Household Income

+121% vs state

$143,695

Per Capita Income

3.7%

Poverty Rate

5.2%

Unemployment Rate

38.0 min

Mean Commute Time

How ZIP 06840 ranks nationally

New Canaan, CT household income vs. every US ZIP code

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

$250,001 Top 1% higher than 99% 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%). Below this entry. $160,000–$180,000: 364 US ZIPs (1%). Below this entry. $180,000–$200,000: 186 US ZIPs (1%). Below this entry. $200,000–$220,000: 324 US ZIPs (1%). This entry sits in this band. 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 87.9%
Bachelor's Degree or Higher 82.5%

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

What does housing look like?

7,747

Total Housing Units

7,153

Occupied Units

594

Vacant Units

2.91

Avg Household Size

Occupancy Type

Owner 83.7%
Renter 16.3%

$1,611,900

Median Home Value

+271% vs state

$3,401

Median Rent

1967

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

+7.2%

YoY Change (2024)

199

HPI Index (2000 = 100)

+99%

Total Change Since 2000

Home values in ZIP 06840 have increased 7.2% over the past year (2024). Since 2000, this ZIP has seen +99% cumulative appreciation.

Year Annual Change HPI Index
2019 -4.0% 144
2020 +3.3% 149
2021 +5.3% 157
2022 +7.2% 168
2024 – 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 665 business establishments in ZIP 06840, employing approximately 5,691 people with a combined annual payroll of $476,740,000.

665

Businesses

5,691

Employees

$476.7M

Annual Payroll

16

Industry Sectors

Industry Establishments % of Total
Professional, scientific, and technical services 111 16.7%
Retail trade 72 10.8%
Finance and insurance 67 10.1%
Accommodation and food services 67 10.1%
Health care and social assistance 66 9.9%
Other services (except public administration) 65 9.8%
Construction 45 6.8%
Real estate and rental and leasing 35 5.3%
Administrative and support and waste management and remediation services 33 5.0%
Wholesale trade 26 3.9%
Arts, entertainment, and recreation 24 3.6%
Educational services 22 3.3%
Transportation and warehousing 10 1.5%
Information 10 1.5%
Management of companies and enterprises 6 0.9%
Manufacturing 4 0.6%

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 06840 vs 06907 →

ZIP 06840 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 06840 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 06840 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 06840 ranks the highest 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
06907 Stamford, CT 9,016 4.2 mi
06850 Norwalk, CT 18,078 3.7 mi
06903 Stamford, CT 14,499 4.1 mi
06820 Darien, CT 20,732 5.6 mi
06897 Wilton, CT 18,071 4.5 mi
06906 Stamford, CT 9,088 6.2 mi
06905 Stamford, CT 19,649 5.4 mi
06851 Norwalk, CT 26,703 5.1 mi
06856 Norwalk, CT 3 5.3 mi
10576 Pound Ridge, NY 5,116 5.4 mi

More ZIP Codes in Fairfield County

06902 standard
Stamford, CT
Pop: 63,406
06810 standard
Danbury, CT
Pop: 49,482
06606 standard
Bridgeport, CT
Pop: 46,236
06484 standard
Shelton, CT
Pop: 39,559
06611 standard
Trumbull, CT
Pop: 36,091
06824 standard
Fairfield, CT
Pop: 33,900

Related Areas

Fairfield County New Canaan, CT Connecticut

Frequently Asked Questions

What county is ZIP code 06840 in? ▼
ZIP code 06840 (New Canaan) is located in Fairfield County, Connecticut. Fairfield County contains multiple ZIP codes, see the full list at /counties/fairfield-ct.
What is the population of ZIP code 06840? ▼
ZIP code 06840 in New Canaan, CT has a population of 19,738 according to the Census Bureau ACS 2023 estimates.
What is the median household income in ZIP 06840? ▼
The median household income in ZIP 06840 is $250,001, which is 228% above the national average of $76,288.
What is the average home value in ZIP 06840? ▼
The median home value in ZIP 06840 is $1,611,900, which is 479% above the national average of $278,155.
What is the demographic makeup of ZIP 06840? ▼
The largest racial group in ZIP 06840 is White at 81.8%. Hispanic or Latino residents make up 6.3% of the population.
How many businesses are in ZIP code 06840? ▼
ZIP code 06840 has 665 business establishments employing approximately 5,691 people, according to Census Bureau ZIP Code Business Patterns (ZBP) 2023 data.
What are the main industries in ZIP code 06840? ▼
The top industries by establishment count in ZIP 06840 are: Professional, scientific, and technical services (111), Retail trade (72), Finance and insurance (67). There are 16 industry sectors represented in total.
How have home values changed in ZIP code 06840? ▼
According to the FHFA House Price Index, home values in ZIP 06840 increased by 7.2% 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 06840? ▼
In ZIP code 06840, 87.9% of residents aged 25+ have a high school diploma or higher, and 82.5% 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 06840? ▼
The mean commute time for workers in ZIP code 06840 is 38.0 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 06840? ▼
In ZIP code 06840, approximately 83.7% of occupied housing units are owner-occupied and 16.3% are renter-occupied, based on Census ACS 2023 data.
What is the poverty rate in ZIP code 06840? ▼
The poverty rate in ZIP code 06840 is 3.7% 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.