Groton, CT 06340 ZIP Code Profile


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ZIP Code 06340: Basic Data & USPS Preferred City Name

Preferred Name, USPS
Groton, CT 06340

Not Acceptable, USPS
Borough, CT 06340
Center Groton, CT 06340
Groton Long Point, CT 06340
Jupiter Point, CT 06340
Noank, CT 06340
Poquonock Bridge, CT 06340

  • ZIP Code Type: STANDARD
  • County: New London County
  • Centroid: Latitude 41.352, Longitude -72.044
  • Time Zone: Eastern Time Zone (UTC -5 hours)
  • Observes DST: Yes
  • Businesses Addresses: 939
  • PO Box Addresses: 1,092
  • Residential Addresses: 12,924
    • Multi-Family Addresses: 2,751
    • Single Family Addresses: 10,173

The ZIP Code maps and database are updated 4 times per year.
Database updated: February 1, 2018, Maps updated: February 1, 2018.

EXTREMELY LOCAL Demographic Data

Address Based Hyperlocal Data Input an address and get data & demographics for the pertinent census block group (CBG), a searchable map and a customized directory. The CBG is the smallest geographical unit used by the Census Bureau for reporting demographic data.


06340 ZIP Code Map

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Groton, CT 06340 Data & Demographics (As of July 1, 2017)


Total Population 28,015
Daytime Population: Workers 22,408
Daytime Population: Residents 12,544
Total Daytime Population (TDP) 34,952
Ratio TDP/Total Population1 1.25
Population in Households 27,230
Population in Familes 20,486
Population in Group Qrtrs 785
Population Density2 1,314
Diversity Index3 62


Median Household Income $56,490
Average Household Income $78,150
Per Capita Income $33,633


Total Housing Units 14,068 (100%)
Owner Occupied HU 4,714 (33.5%)
Renter Occupied HU 7,123 (50.6%)
Vacant Housing Units 2,231 (15.9%)
Median Home Value $225,398
Average Home Value $299,576


Total Households 11,837
Average Household Size 2.3
Family Households 6,912
Average Family Size 3
  1. If the ratio of the TDP to Total Population is greater than 1, the location gains population during the day when commuting workers are present. If the ratio is less than 1, the location is more of a bedroom community where people commute to another place for work.
  2. Population Density = Total Population per square mile.
  3. The Diversity Index is a scale of 0 to 100 that represents the likelihood that two persons, chosen at random from the same area, belong to different race or ethnic groups. If an area's entire population belongs to one race AND one ethnic group, then the area has zero diversity. An area's diversity index increases to 100 when the population is evenly divided into two or more race/ethnic groups.


2010-2017 2017-2022
Population -0.59% 0.08%
Households -0.15% 0.04%
Families -0.25% -0.03%
Median Household Income   1.37%
Per Capita Income   2.43%

Groton, CT 06340 - Peer Comparisons by Rank and Percentile

The table below compares 06340 to the other 275 ZIP Codes in Connecticut by rank and percentile using July 1, 2017 data. The location Ranked # 1 has the highest value. A location that ranks higher than 75% of its peers would be in the 75th percentile of the peer group.

Variable Description Rank Percentile
Total Population # 37 87th
Population Density # 91 67th
Diversity Index # 53 81st
Median Household Income # 232 16th
Per Capita Income # 202 27th

Additional comparisons and rankings can be made with a VERY EASY TO USE Connecticut Census Data Comparison Tool.

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