ZIP code 06340
Where is ZIP code 06340?
Groton, Connecticut
New London County · Standard ZIP code
ZIP code 06340 belongs to Groton, Connecticut in New London County. 06340 is a standard ZIP code, so it covers street addresses as well as PO Boxes. It is in the Eastern Time zone and uses area codes 860 and 959. About 29,863 people live in the 06340 area, where the median household income is $81,792. The closest ZIP codes are 06320 (New London, 2.5 mi west), 06349 (Groton, 3.4 mi northwest) and 06355 (Mystic, 4.2 mi east).
| ZIP code | 06340 |
|---|---|
| Type | Standard ZIP code for street addresses and PO Boxes |
| Status | Active |
| City | Groton |
| State | Connecticut (CT) |
| County | New London County |
| Time zone | Eastern Time · now |
| Area codes | 860, 959 |
| Coordinates | 41.3572, -72.0579 map |
| 3-digit prefix | 063 |
Population and income in 06340
| Population | 29,863 · higher than 89% of Connecticut ZIP codes |
|---|---|
| People per square mile | 1,325 · higher than 66% of Connecticut ZIP codes |
| Median age | 33.7 years · lower than 91% of Connecticut ZIP codes |
| Men / women | 54% / 46% |
| Median household income | $81,792 · lower than 79% of Connecticut ZIP codes |
| Income per person | $47,211 |
| Below the poverty line | 13% |
| Bachelor’s degree or higher | 39% of adults 25+ |
| Median home value | $294,700 · lower than 74% of Connecticut ZIP codes |
| Median rent | $1,599 a month |
| Housing units | 14,359 |
| Households | 12,879 (2.19 people on average) |
| Owners / renters | 45% / 56% |
| Land area | 22.54 sq mi (plus 4.72 sq mi of water) |
Source: U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024) for ZIP Code Tabulation Area 06340. Census ZIP areas are close to, but not exactly the same as, USPS delivery areas.
ZIP codes near 06340
| ZIP code | City | Distance | Type |
|---|---|---|---|
| 06320 | New London, CT | 2.5 mi W | Standard |
| 06349 | Groton, CT | 3.4 mi NW | PO Box only |
| 06355 | Mystic, CT | 4.2 mi E | Standard |
| 06388 | West Mystic, CT | 4.3 mi E | PO Box only |
| 06375 | Quaker Hill, CT | 4.4 mi NW | Standard |
| 06385 | Waterford, CT | 4.6 mi W | Standard |
| 06335 | Gales Ferry, CT | 4.9 mi N | Standard |
| 06372 | Old Mystic, CT | 6 mi E | PO Box only |
| 06339 | Ledyard, CT | 6.6 mi NE | Standard |
| 06390 | Fishers Island, NY | 6.8 mi S | PO Box only |
| 06378 | Stonington, CT | 7.4 mi E | Standard |
| 06382 | Uncasville, CT | 7.8 mi N | Standard |
Straight-line distance between ZIP code center points. Find every ZIP code within 10 miles of 06340 or measure the distance to another ZIP code.
How to address mail to 06340
123 MAIN ST
GROTON CT 06340
Put the city, the two-letter state code and the ZIP code on the last line. Avoid Borough, Center Groton, Groton Long Point, Jupiter Point and Noank and other local names: USPS doesn’t recognize them as the city for this ZIP code. Adding the 4-digit ZIP+4 code (06340-XXXX) helps mail sort faster but isn’t required.
Other ZIP codes in Groton, CT
All Groton ZIP codes with population and income →
Questions
- What city is ZIP code 06340?
- 06340 is a Groton, Connecticut ZIP code.
- What county is 06340 in?
- ZIP code 06340 is in New London County, Connecticut.
- What time zone is ZIP code 06340 in?
- 06340 is in the Eastern Time zone (America/New_York).
- What area code is 06340?
- Phone numbers in ZIP code 06340 use area codes 860 and 959.
- What is the population of ZIP code 06340?
- About 29,863 people live in ZIP code 06340, according to the Census Bureau’s American Community Survey (2020–2024).
- What is the median income in 06340?
- The median household income in 06340 is $81,792 a year, lower than 79% of Connecticut ZIP codes.
- What ZIP codes are near 06340?
- The nearest ZIP codes to 06340 are 06320 (New London, 2.5 miles), 06349 (Groton, 3.4 miles), 06355 (Mystic, 4.2 miles) and 06388 (West Mystic, 4.3 miles).