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Where 06340 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 06340 into a pocket calculator and turn it upside down: OhEgO — not quite a word, sorry.
- ➕ As a number, 6,340 = 2 × 2 × 5 × 317. Its digits add up to 13, a total 1,179 other ZIP codes share.
- 💾In binary, the way a computer stores it:
1100011000100 - 🏠 Its numerical neighbours: 06339 (Ledyard, CT, 7 mi away) and 06349 (Groton, CT, 4 mi away).
- 🔄 Backwards, 06340 becomes 04360 — and that is a real ZIP code: Vienna, ME, 244 miles away.
- 👥 30 other ZIP codes are made of exactly the same digits (03046, 03064, 03604, 04063, 04360, 04630, …). The farthest-flung twin is 34006 in APO AA, a military post office, 2,288 miles away.
- 🧭 Farther north than 70% of all ZIP codes, and farther east than 95%.
- 🎯1,391 miles east of the geographic center of the Lower 48, near Lebanon, Kansas.
- 🌏 Dig straight through the Earth from 06340 and you would come out at 41.35°S, 107.96°E — 783 miles from Perth, Australia, the nearest big city to that spot.
- ☀Longest day of the year: 15h 10m of daylight. Shortest: 9h 11m.
- 📏 At 22.5 square miles of land, 06340 is bigger than 40% of ZIP codes — room for about 17 Central Parks.
- Working out the sun…
- Checking the USGS…
Source: USGS.
People and housing
| Population | 29,863This ZIP29,863 |
|---|---|
| Households | 12,879This ZIP12,879 |
| Housing units | 14,359This ZIP14,359 |
| Median age | 33.7This ZIP33.7Connecticut41.1US 38.9 |
| Median household income | $81,792This ZIP$81,792Connecticut$95,781US $80,734 |
| Median home value | $294,700This ZIP$294,700Connecticut$366,900US $332,700 |
| Median gross rent | $1,599This ZIP$1,599Connecticut$1,488US $1,413 |
| Bachelor's degree or higher | 39.2%This ZIP39.2% |
| Mean commute | 18.2 minThis ZIP18.2 min |
| Population density | 1,324.9 / sq miThis ZIP1,324.9 / sq mi |
Business and tax activity
| Business establishments | 604This ZIP604 |
|---|---|
| Employees | 22,442This ZIP22,442 |
| Annual payroll | $2,096,855,000This ZIP$2,096,855,000 |
| Tax returns filed | 14,120This ZIP14,120 |
| Total adjusted gross income | $1,054,514,000This ZIP$1,054,514,000 |
Land area
| Land area | 22.54 sq miThis ZIP22.54 sq mi |
|---|---|
| Water area | 4.72 sq miThis ZIP4.72 sq mi |
Other place names in 06340
Census places whose land this ZIP code overlaps. The Postal Service may accept other city names in an address, too.
ZIP codes near 06340
| ZIP | City | Distance |
|---|---|---|
06320 | New London, CT | 3.2 mi |
06388 | West Mystic, CT | 3.4 mi |
06355 | Mystic, CT | 3.6 mi |
06349 | Groton, CT | 4.1 mi |
06372 | Old Mystic, CT | 5.3 mi |
06375 | Quaker Hill, CT | 5.6 mi |
06335 | Gales Ferry, CT | 5.6 mi |
06385 | Waterford, CT | 6.1 mi |
06339 | Ledyard, CT | 6.6 mi |
06378 | Stonington, CT | 7.1 mi |
Find every ZIP code within 10 miles of 06340 →
Questions about this ZIP code
Where is ZIP code 06340?
06340 is in Groton, Connecticut, in New London County. Its published point location is 41.3544, -72.0403.
What county is 06340 in?
06340 lies in New London County.
What area code is 06340?
Groton uses area codes 860 and 959, from NANPA's telephone records.
What time zone is 06340 in?
06340 uses America/New_York.
How many people live in 06340?
About 29,863 people live in ZIP code 06340, in 12,879 households, at 1,324.9 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 06340?
$81,792 a year, against $95,781 across Connecticut.
What ZIP codes are near 06340?
The closest are 06320 (3.2 mi), 06388 (3.4 mi), 06355 (3.6 mi), 06349 (4.1 mi) and 06372 (5.3 mi).
Is 06340 a PO Box ZIP code?
06340 is a standard ZIP code. A normal ZIP code with street delivery.
Download or cite
Cite this page
zipcodes.pro. “06340 ZIP Code — Groton, Connecticut (New London County).” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/zip/06340
Machine-readable version of these facts:
curl https://zipcodes.pro/zip/06340.jsonUnderlying data is public domain or openly licensed — sources, vintages and licences.