ZIP Code 06840
standardSource:
New Canaan · Fairfield County · Connecticut
- Population
- 19,738
- Median income
- $250,001
- Median home value
- $1,611,900
- Bachelor's or higher
- 82.5%
- Land area
- 57.5 sq mi
343/sq mi
▲ 228% vs US
higher than 100% of US ZIPs
▲ 479% vs US
higher than 99% of US ZIPs
Median age 42.1
New York
ZIP code 06840 in New Canaan, Connecticut has a population of 19,738. The median household income is $250,001, which is 228% above the national average. Median home value is $1,611,900, 479% above the US average. 82.5% of residents hold a bachelor's degree or higher.
ZIP code 06840 is classified by USPS as a standard delivery area and covers roughly 57.5 square miles in New Canaan, Fairfield County, Connecticut. The area is home to 19,738 residents, producing a population density of 343 people per square mile, and falls within the New York time zone. These USPS and Census boundary values drive every downstream statistic on this page, including the benchmarks that compare 06840 against Connecticut and the nation.
On the economic side, the median household income for ZIP 06840 sits at $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%. On housing, the median home value is $1,611,900 (271% above the state average) with median rent at $3,401 per month, and 83.7% of occupied units are owner-occupied, a direct signal of whether 06840 behaves more like a homeowner neighborhood or a renter-heavy ZIP.
Education and household profile round out the picture: 82.5% of adults hold a bachelor's degree or higher, the median age is 42.1, and the average commute is 38 minutes. We also surface 10 nearby ZIP codes within roughly 10 miles and 6 additional ZIPs sharing Fairfield County, so you can benchmark 06840 against its immediate geography rather than a national average alone. Every figure is sourced from the U.S. Census Bureau American Community Survey 5-Year Estimates, HUD Fair Market Rents, and FHFA Home Price Index data, no estimates, no proprietary scoring. Verify with HUD →
Top industries in ZIP 06840
Top 5 sectors by establishment count
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 + HUD FMR + FHFA HPI ACS demographics, ZBP business establishments, HUD Fair Market Rents, 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; HUD FMR + 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?
$250,001
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
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?
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
$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 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
Related Areas
Frequently Asked Questions
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What is the population of ZIP code 06840? ▼
What is the median household income in ZIP 06840? ▼
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What is the demographic makeup of ZIP 06840? ▼
How many businesses are in ZIP code 06840? ▼
What are the main industries in ZIP code 06840? ▼
How have home values changed in ZIP code 06840? ▼
What is the education level in ZIP code 06840? ▼
What is the average commute time in ZIP 06840? ▼
What percentage of residents own vs. rent in ZIP 06840? ▼
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ZIP Code Research Guides
Official Data Resources for New Canaan, CT
Verify and explore additional data for this area using these official government sources.
Source: U.S. Census Bureau, ACS 5-Year Estimates (2023). Business data: Source: Census ZIP Code Business Patterns (ZBP) 2023. Home value trends: Source: FHFA House Price Index (HPI), Five-Digit ZIP Codes.
PlainZIP is not affiliated with the U.S. Census Bureau or any government agency.
Read our methodology , how this data is sourced, computed, and verified.