Old Greenwich, CT demographics:
population, income, and more

Total population
6,936
0.5% year-over-year change
Median household income
$250,001/yr
0.0% year-over-year change
Housing units
2,542
2.4% year-over-year change

Old Greenwich population

How many people live in Old Greenwich

Old Greenwich is home to 6,936 residents, according to the most recent Census data. Gender-wise, 50.7% of Old Greenwich locals are male, and 49.3% are female.

Total population
6,936
0.5% year-over-year change
Gender ratio
Male
50.7%
3,519
Female
49.3%
3,417
Value Percent YoY change
Male 3,519 50.7% 6.5%
Female 3,417 49.3% -5.1%
A higher population often means more rental variety and livelier areas. The gender balance—how many men live here compared to women—can reveal a lot about the community and the lifestyles of its residents. Use this info to get a sense of the area's pace and personality.

Age demographics

The median age in Old Greenwich is 40, with the population distributed as follows: about 27.6% are children under 15, then 9.8% are in the 15 to 24 age group. Adults between 25 and 44 make up 21% of the population, while another 27.1% fall into the 45 to 64 bracket. Finally, around 14.5% are 65 or older.

Median age
40.5
Age breakdown
Under 15
27.6%
15 to 24
9.8%
25 to 44
21%
45 to 64
27.1%
Over 65
14.5%
Value Percent YoY change
Under 15 1,916 27.6% -1.2%
15 to 24 683 9.8% -10.5%
25 to 44 1,454 21% 6.0%
45 to 64 1,879 27.1% 2.3%
Over 65 1,004 14.5% 1.1%
The age composition helps you get insight into who lives in the area. A younger population might mean a more active, fast-paced vibe, while an older one could suggest a quieter, slower lifestyle. If there's a balanced makeup, you’re likely to find a variety of services, housing types, and community spaces that cater to different life stages.

Racial makeup

In Old Greenwich, 75.9% of the population are US-born citizens, while 12.2% have gained naturalized citizenship. At the same time, 11.8% of residents are non-citizens. As for race, 77.5% of locals are Caucasian, 0.5% are African American and 10% have Asian roots. There’s also a share of 10.6% that includes residents with two or more races.

Citizenship
U.S.-born citizens
75.9%
Non-U.S.-born citizens
12.2%
Non-citizens
11.8%
Value Percent YoY change
U.S.-born citizens 5,267 75.9% -0.6%
Non-U.S.-born citizens 847 12.2% 3.0%
Non-citizens 822 11.8% 5.0%
Racial breakdown
White
77.5%
Black or African American
0.5%
American Indian and Alaska Native
0%
Asian
10%
Native Hawaiian and other Pacific Islander
0%
Two or more races
10.6%
Other
1.4%
Value Percent
White 5,373 77.5%
Black or African American 35 0.5%
Asian 696 10%
Two or more races 735 10.6%
Other 97 1.4%

Households in Old Greenwich

A peek inside Old Greenwich households

Old Greenwich has 2,385 households, with an average of 3 members in each. Of these, 77% are families, while the remaining 23% are made up of individuals living alone or with non-relatives, such as roommates.

Households stats

Total households
2,385
3.2% year-over-year change
Average people per household
3
Non-family households
548
Family households
1,837
Value Percent YoY change
Non-family households 548 23% -0.9%
Family households 1,837 77% 4.5%
The mix between family and non-family households gives a glimpse into daily life. A higher percentage of families might mean more parks and schools, while more non-family setups can mean flexible housing and diverse living styles. For renters, this can signal what kinds of homes are common and can help you figure out if the area matches your lifestyle.

Housing in Old Greenwich

The housing landscape of Old Greenwich

Old Greenwich's housing consists of 2,542 units, with 82.2% being detached single-family homes ideal for those wanting space. Attached options, including duplexes and townhouses, make up 4% and offer a more compact, shared living style.

Housing units
2,542
2.4% year-over-year change
Housing types
Value Percent
1 unit, detached 2,089 82.2%
1 unit, attached 103 4%
2 units 82 3.2%
10 to 19 units 46 1.8%
20 to 49 units 40 1.6%
50 or more units 182 7.2%
Homes built since 2020
18
157.1% year-over-year change

The age of buildings in Old Greenwich

In Old Greenwich, the median construction year is 1966. About 26.1% of homes were built before the 1940s, with another 6.1% going up by 1949. Most development happened in the second half of the 20th century. Then, 11.7% of homes were added from 2000 to 2009, 7.1% between 2010 and 2019, and 0.7% are part of the newest wave of development.

Construction year breakdown by decade
Value Percent YoY change
Built in 1939 or earlier 663 26.1% 8.9%
Built between 1940 and 1949 156 6.1% -4.9%
Built between 1950 and 1959 350 13.8% -2.8%
Built between 1960 and 1969 167 6.6% 9.2%
Built between 1970 and 1979 211 8.3% -25.4%
Built between 1980 and 1989 182 7.2% -3.7%
Built between 1990 and 1999 318 12.5% -1.2%
Built between 2000 and 2009 297 11.7% 53.1%
Built between 2010 and 2019 180 7.1% -10.4%
Built in 2020 or later 18 0.7% 157.1%
As a renter, knowing when homes were built helps you understand the potential condition and design of rental units. Newer builds may have more contemporary layouts, while older homes can offer character or larger lots, depending on the area.

Old Greenwich occupancy rates

Out of the 2,385 occupied housing units in Old Greenwich, 86.3% are owner-occupied, while 13.7% are lived in by tenants. Meanwhile, 6.2% of all homes on the local market sit vacant.

Occupied housing units
2,385
3.2% year-over-year change
Occupancy breakdown
Renter occupied
326
Owner occupied
2,059
Value Percent YoY
change
Renter occupied 326 13.7% -3.3%
Owner occupied 2,059 86.3% 4.3%
Unoccupied housing units
6.2%
Unoccupied housing units refer to homes that are currently without residents—whether they're waiting for renters or owners, used seasonally, or simply unclaimed. A higher share of empty homes may mean more housing availability, while a low number can reflect a tighter market with more competition. This, along with the renter-vs.-owner mix, helps paint a clearer picture of what types of housing and services are likely to be available in the area.

Old Greenwich housing costs

Housing costs in Old Greenwich come to a median of $4,001 per month, while tenants specifically pay a median gross rent of $3,501.

Median housing costs per month
$4,001/month
This figure sums up typical monthly housing costs for all households in the area. If you own, it includes mortgage payments in addition to property taxes, insurance and HOA fees. If you rent, it accounts for rent plus extras like utilities. It’s useful for seeing how local living expenses stack up compared to other places.
Median gross rent in Old Greenwich
$3,501/month
Gross rent gives a more complete look at what renters actually pay, including not just base rent, but also utilities and fees. It’s a key number for evaluating rental affordability in your area of interest and understanding how it compares to nearby locations.

Education in Old Greenwich

Old Greenwich education at a glance

About 9.4% of the population in Old Greenwich went to high school, while 5.2% pursued college studies. Another 2.1% earned an associate degree and 46.1% hold a bachelor’s. Meanwhile, 36.8% went even further, earning a master’s or doctorate.

Education level
Value Percent YoY change
No high school 18 0.4% 5.9%
High school diploma 440 9.4% -11.8%
College diploma 243 5.2% -12.9%
Associate degree 97 2.1% -13.4%
Bachelor's degree 2,148 46.1% 7.8%
Graduate degree 1,713 36.8% 0.5%
A community’s education mix can offer insights into the local economy and housing market. Higher levels of education often align with more job opportunities and stable incomes, which can increase demand for homes and influence both rent prices and rental availability.

Income in Old Greenwich

How much people earn in Old Greenwich

The average annual household income in Old Greenwich was $415,317 in 2024, the most recent annual data available, according to the U.S. Census Bureau. This marked a +8.9% change from the previous year.

Average household income in Old Greenwich
$415,317/year
8.9% year-over-year change
Median household income in Old Greenwich
$250,001/year
0.0% year-over-year change

Old Greenwich income by age

In Old Greenwich, households led by residents aged 25 to 44 — usually in the early to mid stages of their careers — have a median income of $250,001. Those with someone between 45 and 64 in charge, often well established professionally, earn $250,001 overall. Overall, 96.3% of the locals in this community live above the poverty line.

Income breakdown by age
Value YoY change
25 - 44 $250,001 0.0%
45 - 64 $250,001 0.0%
Over 65 $124,583 21.9%
Above poverty level
6,477
Below poverty level
252
Value Percent YoY
change
Above poverty level 6,477 96.3% -0.5%
Below poverty level 252 3.7% 9.1%

Average renter income in Old Greenwich

To get a better sense of what renters earn on average in Old Greenwich, their median household income was $177,143 according to 2022 Census data. In addition, the rent-to-income ratio in the area, at 23.7%, shows what portion of their earnings goes toward housing expenses.

Renter median household income
$177,143
Rent-to-income ratio
23.7%
Understanding the rent-to-income ratio can help renters gauge if local housing costs align with their earnings. A ratio under 30% usually signals affordability, while exceeding this mark means rent is taking a larger-than-recommended bite out of income. That could make it harder for you to cover other costs like transportation, healthcare, or child care.

Employment in Old Greenwich

Workforce and job types in Old Greenwich

The job market in Old Greenwich is powered by 2,946 working residents, spread across a range of industries and roles. 95% of the working population are employed in professional or administrative positions, while 5% are in hands-on or service-based jobs. Also, 17.1% run their own businesses, 71.2% are employed by private companies, and 6.1% work in the public sector.

Workforce demographics

Working population
2,946
4.4% year-over-year change
White collar
2,799
Blue collar
147
Value Percent YoY change
White collar 2,799 95% 2.8%
Blue collar 147 5% 50.0%
Employer type
Self employees
17.1%
Private companies
71.2%
Governmental workers
6.1%
Not for profit companies
5.7%
Value Percent YoY change
Self employees 503 17.1% -6.8%
Private companies 2,096 71.2% 3.3%
Governmental workers 180 6.1% 56.5%
Not for profit companies 167 5.7% 21.9%
Unemployment rate
4.6%
2.2% year-over-year change

Available workforce

The unemployment rate in Old Greenwich stands at 4.6%, representing the share of the workforce currently without a job and actively looking for one.

For renters, the unemployment rate helps paint a picture of job security and financial stability in the area. Rates around 4% to 5% are considered typical. A lower-than-average rate might suggest strong job prospects and a thriving local economy, while a higher rate could hint at fewer opportunities—both useful to consider when planning a move.

Transportation in Old Greenwich

How people get around in Old Greenwich

Commuting methods vary: 42.6% of residents travel by personal vehicle and 1.8% prefer to walk, while the remaining share relies on public transit or on two wheelers to get from A to B.

Means of transportation
Value Percent YoY change
Car 1,237 42.6% 11.2%
Subway or elevated 12 0.4% N/A
Railroad 455 15.7% -11.1%
Bicycle 7 0.2% -22.2%
Walk 52 1.8% 73.3%
Understanding how locals get to work can help you plan your own routine. High car usage might mean you’ll need a vehicle, while strong public transit or walkability could save you the hassle. Commute times also play a big role in quality of life—shorter trips can give you more time for the things you enjoy.

What is the median and average household income in Old Greenwich by zipcode?

Zipcode Population Number of households Median income Average income
06870 7,864 2,756 $250,001 $407,587

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FAQs about Old Greenwich demographics 

What is the total population of Old Greenwich?

Old Greenwich has a total population of 6,936 residents, according to the latest release from the U.S. Census Bureau: the 2019-2023 American Community Survey (ACS) 5-year estimates. This figure changed by +0.5% compared to a year ago.

What is the gender ratio in Old Greenwich?

The gender ratio in Old Greenwich is as follows:
  • 50.7% males (3,519 residents)
  • 49.3% females (3,417 residents)

What is the median age in Old Greenwich?

The median age in Old Greenwich is 40.5.

What is the age distribution of the population in Old Greenwich?

The age distribution in Old Greenwich is as follows:
  • Under 15: 27.6% (1,916 residents)
  • Ages 15-24: 9.8% (683 residents)
  • Ages 25-44: 21% (1,454 residents)
  • Ages 45-64: 27.1% (1,879 residents)
  • Over 65: 14.5% (1,004 residents)

What is the racial and ethnic makeup of Old Greenwich?

The racial and ethnic makeup of Old Greenwich is as follows:
  • White: 77.5% (5,373 residents)
  • Black or African American: 0.5% (35 residents)
  • American Indian and Alaska Native: 0% (0 residents)
  • Asian: 10% (696 residents)
  • Native Hawaiian and Other Pacific Islander: 0% (0 residents)
  • Two or More Races: 10.6% (735 residents)
  • Other: 1.4% (97 residents)

What percentage of the population in Old Greenwich are U.S.-born citizens?

U.S.-born citizens represent 75.9% of the population in Old Greenwich.

How many housing units are there in Old Greenwich?

There are 2,542 housing units in Old Greenwich, reflecting a +2.4% change compared to the previous year, according to the latest data from the U.S. Census Bureau.

How many households are in Old Greenwich and what is the average household size?

Old Greenwich has a total of 2,385 households, with an average of 3 people in each.

What is the median household income in Old Greenwich?

Old Greenwich has a median household income of $250,001, representing a 0.0% shift from the previous year, according to the U.S. Census Bureau.

What is the employment rate and job market overview for Old Greenwich?

The employment rate is 95.4% in Old Greenwich, with a workforce of 2,946 residents. Here’s a detailed breakdown of the local job market:

Job types:
  • White-collar workers: 95% (2,799 residents)
  • Blue-collar workers: 5% (147 residents)

Places of employment:
  • Self-employed: 17.1% (503 residents)
  • Private companies: 71.2% (2,096 residents)
  • Governmental workers: 6.1% (180 residents)
  • Not-for-profit companies: 5.7% (167 residents)

Data source & methodology

The demographic data on this page was sourced from the latest U.S. Census Bureau release—the 2019–2023 American Community Survey (ACS) 5-year estimates.

The information, issued annually, is compiled and published by the Point2Homes Research Team as soon as new data becomes available.

No representation, guarantee, or warranty is made concerning the accuracy or completeness of modified or aggregated information for particular areas.

Page last updated: September 2025