06840
ZIP 06840 is New Canaan, Connecticut, in Fairfield County; area codes 203 and 475; Eastern time.
- Type
- Standard
- Time zone
- America/New_York
- County
- Fairfield
- Metro area
- none
- Population
- 20,870
- Coordinates
- 41.1604, -73.5001
Weather right now
Asking the National Weather Service…
Where 06840 is
Approximate ZIP boundary (Census ZCTA 2020). ZIP codes are mail routes, not areas, so the shape shown is the Census tabulation area that approximates it.
- 🔢 Type 06840 into a pocket calculator and turn it upside down: OhBgO — not quite a word, sorry.
- ➕ As a number, 6,840 = 2 × 2 × 2 × 3 × 3 × 5 × 19. Its digits add up to 18, a total 2,332 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1101010111000 - 🏠 Its numerical neighbours: 06838 (Greens Farms, CT, 10 mi away) and 06850 (Norwalk, CT, 4 mi away).
- 🔄 Backwards, 06840 becomes 04860 — and that is a real ZIP code: Tenants Harbor, ME, 290 miles away.
- 👥 31 other ZIP codes are made of exactly the same digits (04068, 04086, 04680, 04860, 06084, 06408, …). The farthest-flung twin is 86004 in Flagstaff, AZ, 2,076 miles away.
- 🧭 Farther north than 68% of all ZIP codes, and farther east than 92%.
- 🎯1,316 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 06840 and you would come out at 41.16°S, 106.50°E — 820 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 09m of daylight. Shortest: 9h 12m.
- 📏 At 22.2 square miles of land, 06840 is bigger than 39% of ZIP codes — room for about 17 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 20,870This ZIP20,870 |
|---|---|
| Households | 7,153This ZIP7,153 |
| Housing units | 7,747This ZIP7,747 |
| Median age | 42.1This ZIP42.1Connecticut41.1US 38.9 |
| Median household income | $250,000+This ZIP$250,000+Connecticut$95,781US $80,734 |
| Median home value | $1,611,900This ZIP$1,611,900Connecticut$366,900US $332,700 |
| Median gross rent | $3,401This ZIP$3,401Connecticut$1,488US $1,413 |
| Bachelor's degree or higher | 82.5%This ZIP82.5% |
| Mean commute | 38.0 minThis ZIP38.0 min |
| Population density | 940.8 / sq miThis ZIP940.8 / sq mi |
Business and tax activity
| Business establishments | 665This ZIP665 |
|---|---|
| Employees | 5,691This ZIP5,691 |
| Annual payroll | $476,740,000This ZIP$476,740,000 |
| Tax returns filed | 9,110This ZIP9,110 |
| Total adjusted gross income | $6,337,077,000This ZIP$6,337,077,000 |
Land area
| Land area | 22.18 sq miThis ZIP22.18 sq mi |
|---|---|
| Water area | 0.33 sq miThis ZIP0.33 sq mi |
Other place names in 06840
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 06840
| ZIP | City | Distance |
|---|---|---|
06850 | Norwalk, CT | 3.7 mi |
06903 | Stamford, CT | 4.1 mi |
06907 | Stamford, CT | 4.2 mi |
06897 | Wilton, CT | 4.7 mi |
06851 | Norwalk, CT | 5.4 mi |
06856 | Norwalk, CT | 5.4 mi |
06905 | Stamford, CT | 5.5 mi |
06858 | Norwalk, CT | 5.6 mi |
10576 | Pound Ridge, NY | 5.7 mi |
06820 | Darien, CT | 5.9 mi |
Find every ZIP code within 10 miles of 06840 →
Questions about this ZIP code
Where is ZIP code 06840?
06840 is in New Canaan, Connecticut, in Fairfield County. Its published point location is 41.1604, -73.5001.
What county is 06840 in?
06840 lies in Fairfield County.
What area code is 06840?
New Canaan uses area codes 203 and 475, from NANPA's telephone records.
What time zone is 06840 in?
06840 uses America/New_York.
How many people live in 06840?
About 20,870 people live in ZIP code 06840, in 7,153 households, at 940.8 people per square mile. These are American Community Survey 5-year estimates for the ZIP Code Tabulation Area, not a headcount.
What is the median household income in 06840?
$250,000+ a year, against $95,781 across Connecticut.
What ZIP codes are near 06840?
The closest are 06850 (3.7 mi), 06903 (4.1 mi), 06907 (4.2 mi), 06897 (4.7 mi) and 06851 (5.4 mi).
Is 06840 a PO Box ZIP code?
06840 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “06840 ZIP Code — New Canaan, Connecticut (Fairfield County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/06840
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/06840.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.