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ZIP code

06340

Groton, CT

STANDARD

06340 covers Groton in New London County, with 29,833 people in the ACS 2023 estimate.

Figures are for the Census ZIP Code Tabulation Area (ZCTA), which is not the same as a USPS ZIP code. A PO Box or unique ZIP may have no ZCTA and no demographics. Methodology

ACS 2023 population

29,833

Median household income

$77,768

Median home value

$275,500

U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: ZCTA 06340. Methodology

ZIP code map of 06340

Census ZCTA boundary for ZIP 06340 in Groton, Connecticut
Census ZCTA boundary for ZIP 06340 in Groton, Connecticut. A ZCTA is not the same as a USPS ZIP code. Boundaries: U.S. Census Bureau. Methodology · Data sources
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About ZIP code 06340

Type

STANDARD

City

Groton

County

New London County

Timezone

America/New_York

Area codes

860, 959

Land area

22.5 sq mi

Water area

4.72 sq mi

Households

14,441

Median gross rent

$1,492

More enterprise fields

Timezone
America/New_York
Area Codes
860, 959
World Region
NA
Country
US

Commercial ZIP directory · not ACS

Commercial ZIP directory population_count for ZCTA 06340. Not ACS. Methodology

People in 06340

Race

  • White20,558
  • Black or African American2,230
  • American Indian or Alaska Native264
  • Asian1,735
  • Native Hawaiian and Pacific Islander63
  • Other race1,636
  • Two or more races3,302

Hispanic or Latino (any race): 4,184

Age

  • Under 103,512
  • 10 to 192,780
  • 20 to 296,135
  • 30 to 394,948
  • 40 to 492,732
  • 50 to 593,196
  • 60 to 693,209
  • 70 to 791,989
  • 80 and older1,287

Income and housing in 06340

Poverty rate

12.2%

Median earnings

$45,308

Median household income

$77,768

Median home value

$275,500

Median gross rent

$1,492

Education

  • High school graduate93.1%
  • Bachelor's degree38.1%
  • Graduate degree15.9%

Places covering 06340

Cities and places — Population overlap

Share of this ZIP/ZCTA’s population located within each place, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.

ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology

Counties — Population overlap

Share of this ZIP/ZCTA’s population located within each county, based on ZIP Code Database county-overlap data. This is a population measure, not land-area overlap or the Census county population.

ZIP Code Database county-overlap table, field percent_of_zip_population_in_county, keyed by county_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology

12.7% of this ZIP is outside city limits (a real overlap row, not missing data).

Population history for 06340

IRS populationACS population
34,31117,155020052023

Hover the chart or read the table below (Year | ACS | IRS).

Population history. Year | ACS population | IRS population. ACS and IRS are separate series. Blank cells mean that source did not publish a count for the year.
YearACS populationIRS population
200525,719
200624,954
200726,211
200824,957
200924,936
201025,258
201131,44225,341
201231,59425,230
201331,76925,480
201431,76025,780
201531,42425,320
201631,46724,270
201731,22924,120
201830,76423,870
201930,40323,940
202030,48623,740
202130,56523,470
202229,67223,550
202329,833

ACS: U.S. Census Bureau American Community Survey 5-year estimates. IRS: Statistics of Income ZIP Code data.

ZIP codes near 06340

12 nearest ZIP centroids (any distance)

  1. 06320New London3.2 miPop 27,275 · Income $60,224
  2. 06355Mystic3.6 miPop 12,223 · Income $132,367
  3. 06375Quaker Hill5.6 miPop 3,667 · Income $104,427
  4. 06335Gales Ferry5.6 miPop 6,100 · Income $126,121
  5. 06385Waterford6.1 miPop 15,900 · Income $110,375
  6. 06339Ledyard6.6 miPop 9,263 · Income $104,963
  7. 06378Stonington7.1 miPop 5,408 · Income $126,014
  8. 06390Fishers Island7.2 miPop 53 · Income $51,964
  9. 06338Mashantucket8.4 miPop 62 · Income —
  10. 06382Uncasville8.7 miPop 10,076 · Income $85,021
  11. 06353Montville8.7 miPop 369 · Income —
  12. 06357Niantic9.6 miPop 11,315 · Income $98,852

ZIP centroids within 2 miles

No other ZIP codes within 2 miles of 06340, measured by Census internal-point centroids. Try a wider radius.

ZIPs within 2 miles of this place

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06340 Groton, CT

Looking up ZIP codes within 2 miles of 06340 Groton, CT, measured by centroid distance.

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Avg median income

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ZIP code 06340 FAQ

What city is ZIP code 06340 in?
06340 is in Groton, CT.
What county is 06340 in?
06340 is in New London County.
What is the median household income in 06340?
The median household income in 06340 is $77,768.
Which ZIP codes are near 06340?
Use the radius tool on this page to list ZIP codes within a chosen distance of 06340.