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 High-density area
- $250,000+
- Median income Above-median income area
- $1,611,900
- Median home value Above-median home value
- 82.5%
- Bachelor's or higher Above-average bachelor's attainment
National ZIP placement
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 $250,000+ (121% above the average Connecticut ZIP), while per-capita income is $143,695. The poverty rate is 3.7%, with unemployment at 5.2%; those measures add context to the income figure. Housing is both higher-cost and owner-heavy: median home value is $1,611,900 (271% above the average Connecticut ZIP), while 83.7% of occupied homes are owner-occupied and median rent is $3,401.
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. The page also surfaces 10 ZIP codes within roughly 10 miles and 6 more in Fairfield County, so 06840 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 06840
Top 5 sectors by establishment count in New Canaan, CT
Which industries have the most business establishments in ZIP 06840.
- Professional, scientific, and technical services
Professional, scientific, and technical services
111 establishments
- Retail trade
Retail trade
72 establishments
- Finance and insurance
Finance and insurance
67 establishments
- Accommodation and food services
Accommodation and food services
67 establishments
- Health care and social assistance
Health care and social assistance
66 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 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
Who lives in ZIP 06840?
42.1
Median Age
47.0%
Male
53.0%
Female
15.6%
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?
$250,000+
Median Household Income
+121% vs state ZIP avg
$143,695
Per Capita Income
3.7%
Poverty Rate
5.2%
Unemployment Rate
38.0 min
Mean Commute Time
How ZIP 06840 ranks among Connecticut ZIPs
New Canaan, 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)
$250,000 Top 3% higher than 97% 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
7,747housing units
7,747
Total Housing Units
7,153
Occupied Units
594
Vacant Units
2.91
Avg Household Size
Occupancy Type
$1,611,900
Median Home Value
+271% vs state ZIP avg
$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.
- 06851
Norwalk (06851)
26,703 residents
- 06820
Darien (06820)
20,732 residents
- 06840
New Canaan (06840)
19,738 residents
- 06905
Stamford (06905)
19,649 residents
- 06850
Norwalk (06850)
18,078 residents
- 06897
Wilton (06897)
18,071 residents
- 06903
Stamford (06903)
14,499 residents
- 06906 9,088
Stamford (06906)
9,088 residents
- 06907 9,016
Stamford (06907)
9,016 residents
What this shows Among its immediate neighbors, ZIP 06840 ranks #3 by population - useful context the national average alone can't give.
ZIP 06840 vs its nearest neighbors, by median income
Median household income of this ZIP and the closest reporting ZIP codes within ~10 miles.
- 06840
New Canaan (06840)
$250,000 median income
- 06820
Darien (06820)
$250,000 median income
- 10576
Pound Ridge (10576)
$250,000 median income
- 06897
Wilton (06897)
$242,199 median income
- 06903
Stamford (06903)
$204,028 median income
- 06905
Stamford (06905)
$136,757 median income
- 06850
Norwalk (06850)
$123,633 median income
- 06851
Norwalk (06851)
$111,341 median income
- 06907
Stamford (06907)
$106,379 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.
| 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 |
Nationwide ZIPs with similar ACS profiles
Two Census-derived peer sets for ZIP 06840, 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 (19,738 here; floor ≥1,000).
Similar median household income
Nearest cross-state ZIPs by ACS median household income.
More ZIP Codes in Fairfield County
Related Areas
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 $250,000+, 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.
Related
Take this with you
What to do with ZIP 06840's numbers, next.
- See how ZIP 06840 compares to a neighboring ZIP code on the same Census fields Compare this ZIP
- Check where New Canaan, CT ranks among every U.S. ZIP code on income, education, or homeownership View national rankings
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ZIP Code Tabulation Areas (ZCTAs) are Census Bureau approximations of USPS ZIP codes; figures describe the ZCTA area, not any single address within it.