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Where 06851 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 06851 into a pocket calculator and turn it upside down: ISBgO — not quite a word, sorry.
- ➕ As a number, 6,851 = 13 × 17 × 31. Its digits add up to 20, a total 2,586 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1101011000011 - 🏠 Its numerical neighbours: 06850 (Norwalk, CT, 2 mi away) and 06852 (Norwalk, CT, 12 mi away).
- 🔄 Backwards, 06851 becomes 15860 — and that is a real ZIP code: Sigel, PA, 293 miles away.
- 👥 51 other ZIP codes are made of exactly the same digits (01568, 01586, 01865, 05681, 05861, 06518, …). The farthest-flung twin is 85601 in Arivaca, AZ, 2,192 miles away.
- 🧭 Farther north than 68% of all ZIP codes, and farther east than 92%.
- 🎯1,322 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 06851 and you would come out at 41.14°S, 106.60°E — 816 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 09m of daylight. Shortest: 9h 12m.
- 📏 At 7.7 square miles of land, 06851 is bigger than 24% of ZIP codes — room for about 5.8 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 27,865This ZIP27,865 |
|---|---|
| Households | 11,348This ZIP11,348 |
| Housing units | 11,910This ZIP11,910 |
| Median age | 43.2This ZIP43.2Connecticut41.1US 38.9 |
| Median household income | $111,341This ZIP$111,341Connecticut$95,781US $80,734 |
| Median home value | $587,400This ZIP$587,400Connecticut$366,900US $332,700 |
| Median gross rent | $2,071This ZIP$2,071Connecticut$1,488US $1,413 |
| Bachelor's degree or higher | 46.4%This ZIP46.4% |
| Mean commute | 28.4 minThis ZIP28.4 min |
| Population density | 3,625.0 / sq miThis ZIP3,625.0 / sq mi |
Business and tax activity
| Business establishments | 1,061This ZIP1,061 |
|---|---|
| Employees | 17,184This ZIP17,184 |
| Annual payroll | $1,625,523,000This ZIP$1,625,523,000 |
| Tax returns filed | 15,070This ZIP15,070 |
| Total adjusted gross income | $1,576,358,000This ZIP$1,576,358,000 |
Land area
| Land area | 7.69 sq miThis ZIP7.69 sq mi |
|---|---|
| Water area | 0.06 sq miThis ZIP0.06 sq mi |
Other place names in 06851
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 06851
| ZIP | City | Distance |
|---|---|---|
06858 | Norwalk, CT | 2.1 mi |
06856 | Norwalk, CT | 2.1 mi |
06881 | Westport, CT | 2.3 mi |
06850 | Norwalk, CT | 2.4 mi |
06889 | Westport, CT | 2.9 mi |
06880 | Westport, CT | 3.0 mi |
06854 | Norwalk, CT | 3.6 mi |
06838 | Greens Farms, CT | 4.4 mi |
06855 | Norwalk, CT | 4.6 mi |
06853 | Norwalk, CT | 5.3 mi |
Find every ZIP code within 10 miles of 06851 →
Questions about this ZIP code
Where is ZIP code 06851?
06851 is in Norwalk, Connecticut, in Fairfield County. Its published point location is 41.1382, -73.4016.
What county is 06851 in?
06851 lies in Fairfield County.
What area code is 06851?
Norwalk uses area codes 203 and 475, from NANPA's telephone records.
What time zone is 06851 in?
06851 uses America/New_York.
How many people live in 06851?
About 27,865 people live in ZIP code 06851, in 11,348 households, at 3,625.0 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 06851?
$111,341 a year, against $95,781 across Connecticut.
What ZIP codes are near 06851?
The closest are 06858 (2.1 mi), 06856 (2.1 mi), 06881 (2.3 mi), 06850 (2.4 mi) and 06889 (2.9 mi).
Is 06851 a PO Box ZIP code?
06851 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “06851 ZIP Code — Norwalk, Connecticut (Fairfield County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/06851
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/06851.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.