| City: | Groton, Connecticut |
| City Alias: | Noank |
| Names to Avoid: | Borough, Center Groton, Groton Long Point, Jupiter Point, Poquonock Bridge |
| Planning Region: | Southeastern Ct Planning Region |
| Timezone: | Eastern (GMT -05:00) |
| Local Time: | 8:52:42 PM |
| Population: | 29,788 [See All] |
| Area Codes: | 860 / 959 |
| Classification: | Standard [Normal Street Delivery] |
| Coordinates: | 41.3580, -72.0385 |
| Land Area: | 22.54 sq mi |
| Quick Link: |
ZIP Code 06340 has 29,788 residents and 12,452 households (average 2.22 persons per household). The median age is 34.5 years, younger than the state (41.1) and younger than the nation (38.8). The gender split is 51.7% male and 48.3% female, which is higher than the state male share (48.5%), making this a male-majority area. Largest groups are White (69.0%, much higher than the national average of 61.6%) and Hispanic or Latino (14.0%); Hispanic or Latino residents make up 14.0%, which is lower than the national average (18.7%).
Explore More: Population Over Time By Age & Gender By Race By Gender Nativity & Citizenship
| 2020 Population: | 29,788Source: Census DHC |
| 2023 ACS Population Estimate: | 29,833Source: Census ACS |
| 2025 ZC Population Estimate: | 29,215Source: ZIP-Codes.com |
| Population Density: | 1,321.6 people per sq mile |
| Average Income: | $77,768Source: Census ACS |
| Households: | 12,452Source: Census DHC |
| Average House Value: | $275,500Source: Census ACS |
| Persons Per Household: | 2.22Source: Census DHC |
| Average Family Size: | 3.16Source: Census ACS |
| Group | 2010 | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Census ACS Population Estimate | -- | 31,442 | 31,594 | 31,769 | 31,760 | 31,424 | 31,467 | 31,229 | 30,764 | 30,403 | 30,486 | 30,565 | 29,672 | 29,833 |
| Decennial Census | 31,242 | -- | -- | -- | -- | -- | -- | -- | -- | -- | 29,788 | -- | -- | -- |
Median Age: 34.5
Male Median Age: 32.1
Female Median Age: 37.4
| Group | < 5 | 5-9 | 10-14 | 15-19 | 20-24 | 25-29 | 30-34 | 35-39 | 40-44 | 45-49 | 50-54 | 55-59 | 60-64 | 65-69 | 70-74 | 75-79 | 80-84 | 85+ |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Male | 930 | 841 | 708 | 703 | 1,807 | 2,004 | 1,499 | 1,213 | 711 | 627 | 699 | 824 | 823 | 668 | 505 | 370 | 217 | 248 |
| Female | 865 | 876 | 730 | 639 | 1,008 | 1,316 | 1,249 | 987 | 697 | 697 | 802 | 871 | 921 | 797 | 635 | 479 | 334 | 488 |
| Total | 1,795 | 1,717 | 1,438 | 1,342 | 2,815 | 3,320 | 2,748 | 2,200 | 1,408 | 1,324 | 1,501 | 1,695 | 1,744 | 1,465 | 1,140 | 849 | 551 | 736 |
| White: | 20,558 | 67.03% |
| Black: | 2,230 | 7.27% |
| Hispanic:* | 4,184 | 13.64% |
| Asian: | 1,735 | 5.66% |
| American Indian: | 264 | 0.86% |
| Hawaiian: | 63 | 0.21% |
| Other: | 1,636 | 5.33% |
| Total: | 30,670 | 100% |
| Gender | Count | % | Median Age |
|---|---|---|---|
| Males: | 15,397 | 51.69% | 32.1 years |
| Females: | 14,391 | 48.31% | 37.4 years |
| Total: | 29,788 | 100% | 34.5 years |
| Native, born in the United States: | 26,509 | 88.86% |
| Native, born in PR, Island Areas, or abroad: | 538 | 1.80% |
| Foreign born, naturalized U.S. citizen: | 1,492 | 5.00% |
| Foreign born, not a U.S. citizen: | 1,294 | 9.34% |
| Total Population: | 29,833 | 100% |
| Total Native Population: | 27,047 | 90.66% |
| Total Foreign-born Population: | 2,786 | 9.34% |
In 2023, the Median household income is $77,768, which is considerably lower than the state median ($93,760), is up $21,162 (37.4%) since 2011 and above its 2019 pre-pandemic level by $18,528. Family households earn a median of $79,673 versus $71,250 for nonfamily households (a difference of $8,423). By gender, male median income is $67,486 and female is $56,327, which is far less than the state female median ($66,106), with a current gap of $11,159 that has widened from 2011 to 2023. The labor-force participation rate is 77.1%, which is far greater than the national rate (63.5%). The unemployment rate is 4.5%, which is below the state rate (5.6%). The largest occupation group is Management (50.0%).
Explore More: Income Over Time Household Income Employment Status By Occupation
| Income Type | 2011 | 2012 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Household Income | $56,606 | $57,942 | $55,992 | $54,947 | $57,620 | $60,649 | $58,331 | $61,980 | $59,240 | $65,169 | $69,736 | $76,138 | $77,768 |
| Median Family Income | $64,275 | $68,783 | $66,025 | $64,196 | $69,500 | $70,252 | $66,430 | $71,619 | $66,972 | $66,095 | $72,014 | $82,308 | $79,673 |
| Median NonFamily Income | $43,663 | $44,571 | $43,942 | $45,417 | $43,258 | $42,965 | $47,390 | $47,954 | $48,206 | $53,663 | $62,355 | $69,652 | $71,250 |
| Median Male Income | $42,014 | $44,250 | $44,046 | $44,164 | $45,902 | $43,004 | $42,315 | $45,381 | $44,613 | $50,848 | $54,586 | $63,646 | $67,486 |
| Median Female Income | $37,978 | $37,732 | $39,095 | $42,163 | $42,050 | $41,944 | $40,955 | $40,919 | $40,757 | $41,458 | $45,371 | $52,600 | $56,327 |
| Employed: | 13,310 | 60.84% |
| Unemployed: | 753 | 3.44% |
| Not In Labor Force: | 7,814 | 35.72% |
| Total: | 21,877 | 100% |
| Management, business, science, and arts: | 6,654 | 49.99% |
| Service: | 2,260 | 16.98% |
| Sales and Office: | 2,312 | 17.37% |
| Natural resources, construction, and maintenance: | 869 | 6.53% |
| Production, transportation, and material moving: | 1,215 | 9.13% |
| Total Civilian Employed Population: | 13,310 | 100% |
In 2023, the median home value is $275,500, which is much lower than the state median ($343,200), is up $42,000 (17.99%) since 2011 and above its 2019 pre-pandemic level by $65,000. The median gross rent is $1,492, which is notably higher than the national median ($1,348), is up $395 (36.01%) since 2011 and above its 2019 pre-pandemic level by $223. Of occupied housing, owners make up 42.24% (59.33% with a mortgage, 40.67% free-and-clear) and renters 57.76% - making this ZIP Code less home ownership than the state and higher than national rental averages. The vacancy rate is 10.35%, which is considerably higher than the state rate (7.54%).
Explore More: Compare Home Value Home Value Over Time Rent & Over Time Housing Occupancy
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Home Value | $233,500 | $235,300 | $225,500 | $221,300 | $222,600 | $209,400 | $200,300 | $200,200 | $210,500 | $213,800 | $211,500 | $248,000 | $275,500 |
| Less than $500: | 748 | 10.00% |
| $500 to $999: | 426 | 5.70% |
| $1,000 to $1,499: | 2,593 | 34.68% |
| $1,500 to $1,999: | 2,605 | 34.84% |
| $2,000 to $2,499: | 668 | 8.93% |
| $2,500 to $2,999: | 199 | 2.66% |
| $3,000 or more: | 215 | 2.88% |
| No Rent: | 23 | 0.31% |
| Total: | 7,477 | 100% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Median Rent | $1,097 | $1,125 | $1,114 | $1,138 | $1,138 | $1,170 | $1,181 | $1,252 | $1,269 | $1,269 | $1,332 | $1,423 | $1,492 |
| Owner Occupied (with mortgage): | 3,245 | 25.07% |
| Owner Occupied (free and clear, no mortgage): | 2,224 | 17.18% |
| Renter Occupied: | 7,477 | 57.76% |
| Total Occupied Housing Units: | 12,946 | 100% |
| Occupied Housing Units: | 12,946 | 89.65% |
| Vacant Housing Units (not graphed): | 1,495 | 10.35% |
| Total Housing Units: | 14,441 | 100% |
| Single-Family Units: | 7,164 | 49.61% |
| Multi-Family Units: | 6,900 | 47.78% |
| Other Units: | 377 | 2.61% |
| Total Housing Units: | 14,441 | 100% |
In 2023, 38.10% of adults (25+) have a bachelor's degree or higher, which is generally lower than the state rate (41.90%). High school or higher is 93.10%, which is well above the national rate (89.40%). The uninsured rate is 4.20%, which is far lower than the national rate (8.60%). The share of people in poverty is 11.20%, which is markedly above the state rate (6.80%), up 3.80 percentage points since 2011 and above its 2019 pre-pandemic level by 3.70 percentage points. This points to rising hardship - a weaker consumer base, greater strain on public services, and job-market headwinds. Among residents ages 3+, the largest enrollment group is elementary (40.48%). College enrollment is 23.38%, which is markedly below the state rate (29.40%), indicating the community may be more oriented toward vocational/trade or direct-to-workforce opportunities.
Explore More: Educational Attainment Health Insurance Poverty Over Time School Enrollment
| Less than 9th grade: | 688 | 3.44% |
| 9th to 12th grade, no diploma: | 695 | 3.48% |
| High school graduate (includes equivalency): | 5,368 | 26.85% |
| Some college, no degree: | 4,236 | 21.19% |
| Associate's degree: | 1,385 | 6.93% |
| Bachelor's degree: | 4,437 | 22.19% |
| Graduate or professional degree: | 3,184 | 15.93% |
| Total: | 19,993 | 100% |
| High school or higher: | 18,610 | 93.08% |
| Bachelor's degree or higher: | 7,621 | 38.12% |
| Private Insurance: | 18,939 | 62.30% |
| Public Insurance: | 10,336 | 34.00% |
| No Insurance: | 1,125 | 3.70% |
| Total: | 30,400 | 100% |
| Has Health Insurance: | 29,275 | 96.30% |
| Group | 2011 | 2102 | 2013 | 2014 | 2015 | 2016 | 2017 | 2018 | 2019 | 2020 | 2021 | 2022 | 2023 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| % of People in Poverty | 7.4% | 7.2% | 7.8% | 7.9% | 7.9% | 7.0% | 8.3% | 7.5% | 7.5% | 7.7% | 8.2% | 8.0% | 11.2% |
Note: Counts of Families & People in poverty are not published at the ZIP Code level due to small sample sizes. Percentages shown are survey estimates from the American Community Survey (ACS). They may differ from official poverty statistics. The U.S. Census Bureau defines poverty status by comparing a family's or individual's total income with federal poverty thresholds that vary by family size and composition.
| Nursery School, Preschool: | 566 | 9.85% |
| Kindergarten: | 198 | 3.44% |
| Elementary school (grades 1-8): | 2,327 | 40.48% |
| High school (grades 9-12): | 1,314 | 22.86% |
| College or graduate school: | 1,344 | 23.38% |
| Total: | 5,749 | 100% |
| Early Childhood: | 764 | 13.29% |
| K-12 (Primary & Secondary School): | 3,839 | 66.78% |
ZIP Code 06340 supports both business and residential activity. According to the Business Census (2023), there are 604 business establishments, employing about 22,442 people with an annual payroll of $2,096,855,000. USPS data shows 13,160 residential mailboxes and 711 business mailboxes, reflecting local delivery coverage.
| # Residential Mailboxes: | 13,160Source: USPS |
| # Business Mailboxes: | 711Source: USPS |
| Total Delivery Receptacles: | 14,530Source: USPS |
| Single Family Delivery Units: | 6,684Source: USPS |
| Multi Family Delivery Units: | 2,964Source: USPS |
| # of Businesses: | 604Source: CBP |
| 1st Quarter Payroll: | $691,311,000Source: CBP |
| Annual Payroll: | $2,096,855,000Source: CBP |
| # of Employees: | 22,442Source: CBP |
ZIP Code 06340 is located in Southeastern Ct Planning Region, Connecticut, within the Norwich-New London-Willimantic, CT Metropolitan Statistical Area (CBSA 35980) and Connecticut's 2nd Congressional District. This Metro area has a population of 279,025 people, about 10.68% of whom live in ZIP Code 06340. It covers 22.54 sq mi of land and a water area of 4.722 sq mi.
| CBSA Name: | Norwich-New London-Willimantic, CTSource: Census |
| CBSA Number: | 35980Source: Census |
| CBSA Type: | MetroSource: Census |
| CBSA Division: | --Source: Census |
| CBSA Population: | 279,025Source: Census |
| MSA: | New London-Norwich, CT-RI MSASource: Census |
| Land Area: | 22.54 sq miSource: Census |
| Water Area: | 4.722 sq miSource: Census |
| Congressional District: | 02Source: USPS |
| Congressional Land Area: | 1987.68 sq miSource: Census |
| PMSA: | --Source: Census |
| Intro Date: | < 2004-10Source: ZIP-Codes.com |
| Place FIPS Code: | 0934180Source: Census |
| Place Name: | Groton city; ConnecticutSource: Census |
ZIP Code 06340 is in the Groton School District, which serves grades Pre-Kindergarten thru 12th. There are 8 public schools and 1 private school(s) in this ZIP Code. It also has 6 colleges, universities or post secondary education institutions nearby which would be a short commute to.
Our sources include trusted federal and licensed data from the United States Postal Service, U.S. Census Bureau, U.S. Geological Survey, Centers for Medicare & Medicaid Services, and the National Center for Education Statistics, along with proprietary datasets created by ZIP-Codes.com. Data last updated on October 1, 2025.