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Where 06437 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 06437 into a pocket calculator and turn it upside down: LEhgO — not quite a word, sorry.
- ➕ As a number, 6,437 = 41 × 157. Its digits add up to 20, a total 2,586 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100100100101 - 🏠 Its numerical neighbours: 06426 (Essex, CT, 16 mi away) and 06438 (Haddam, CT, 13 mi away).
- 🔄 Backwards, 06437 becomes 73460 — and that is a real ZIP code: Tishomingo, OK, 1,390 miles away.
- 👥 63 other ZIP codes are made of exactly the same digits (03467, 03746, 04637, 04673, 04736, 04763, …). The farthest-flung twin is 76430 in Albany, TX, 1,569 miles away.
- 🧭 Farther north than 69% of all ZIP codes, and farther east than 93%.
- 🎯1,357 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 06437 and you would come out at 41.33°S, 107.30°E — 802 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 10m of daylight. Shortest: 9h 11m.
- 📏 At 47.1 square miles of land, 06437 is bigger than 58% of ZIP codes — room for about 36 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 22,067This ZIP22,067 |
|---|---|
| Households | 8,856This ZIP8,856 |
| Housing units | 9,825This ZIP9,825 |
| Median age | 51.2This ZIP51.2Connecticut41.1US 38.9 |
| Median household income | $137,615This ZIP$137,615Connecticut$95,781US $80,734 |
| Median home value | $515,000This ZIP$515,000Connecticut$366,900US $332,700 |
| Median gross rent | $1,717This ZIP$1,717Connecticut$1,488US $1,413 |
| Bachelor's degree or higher | 60.5%This ZIP60.5% |
| Mean commute | 25.9 minThis ZIP25.9 min |
| Population density | 468.3 / sq miThis ZIP468.3 / sq mi |
Business and tax activity
| Business establishments | 669This ZIP669 |
|---|---|
| Employees | 8,094This ZIP8,094 |
| Annual payroll | $614,889,000This ZIP$614,889,000 |
| Tax returns filed | 11,250This ZIP11,250 |
| Total adjusted gross income | $1,890,874,000This ZIP$1,890,874,000 |
Land area
| Land area | 47.12 sq miThis ZIP47.12 sq mi |
|---|---|
| Water area | 1.57 sq miThis ZIP1.57 sq mi |
Other place names in 06437
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 06437
| ZIP | City | Distance |
|---|---|---|
06443 | Madison, CT | 3.9 mi |
06471 | North Branford, CT | 3.9 mi |
06472 | Northford, CT | 5.8 mi |
06405 | Branford, CT | 5.9 mi |
06419 | Killingworth, CT | 6.8 mi |
06473 | North Haven, CT | 9.0 mi |
06513 | New Haven, CT | 9.0 mi |
06413 | Clinton, CT | 9.1 mi |
06422 | Durham, CT | 9.5 mi |
06512 | New Haven, CT | 10.0 mi |
Find every ZIP code within 10 miles of 06437 →
Questions about this ZIP code
Where is ZIP code 06437?
06437 is in Guilford, Connecticut, in New Haven County. Its published point location is 41.3318, -72.6968.
What county is 06437 in?
06437 lies in New Haven County.
What area code is 06437?
Guilford uses area codes 203 and 475, from NANPA's telephone records.
What time zone is 06437 in?
06437 uses America/New_York.
How many people live in 06437?
About 22,067 people live in ZIP code 06437, in 8,856 households, at 468.3 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 06437?
$137,615 a year, against $95,781 across Connecticut.
What ZIP codes are near 06437?
The closest are 06443 (3.9 mi), 06471 (3.9 mi), 06472 (5.8 mi), 06405 (5.9 mi) and 06419 (6.8 mi).
Is 06437 a PO Box ZIP code?
06437 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “06437 ZIP Code — Guilford, Connecticut (New Haven County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/06437
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/06437.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.