Old Greenwich, Connecticut Demographics & Population 2026
During the 2020–2024 ACS period, Old Greenwich, Connecticut had a total population of 6,936, the 53rd largest community in Connecticut, with a median household income of $250,000+, which is 161% higher than the state average. The poverty rate is 3.6%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Key Takeaways
- Household income is 161% above the state average — one of the wealthiest communities in Connecticut.
- An exceptionally low poverty rate of 3.6% — among the lowest in Connecticut.
- 85.4% of adults hold a bachelor's degree or higher — top 10% in Connecticut.
- Housing affordability is a challenge — homes cost 7.4x the median household income.
Old Greenwich Quick Facts
How Old Greenwich Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 6,904 | 6,936 | +0.5% |
| Median household income | $250,000+ | $250,000+ | +0.0% |
| Median home value | $1,668,200 | $1,844,700 | +10.6% |
How Old Greenwich Compares
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 57 | National average: 61
Education
Educational Attainment (Adults 25+)
Old Greenwich Rankings in Connecticut
Explore Connecticut Rankings
Cities Similar to Old Greenwich
These cities in the same state have comparable population and economic profiles.
| City | Population | Median Income | Home Value | Bachelor's+ | Poverty |
|---|---|---|---|---|---|
| Staples | 7,340 | $192,656 | $1,165,500 | 73.0% | 4.4% |
| Cos Cob | 7,546 | $190,481 | $1,210,400 | 70.2% | 5.6% |
| Noroton | 5,539 | $250,000+ | $1,620,000 | 82.6% | 5.9% |
| Riverside | 8,954 | $250,000+ | $1,900,300 | 78.8% | 3.3% |
| Ridgefield | 6,970 | $148,279 | $843,600 | 68.9% | 2.5% |
Population Overview
Old Greenwich is a small city located in Connecticut. The total population is 6,936. It ranks as the 53rd most populous out of 214 Census-designated places in Connecticut.
Age Demographics
The median age in Old Greenwich is 40.5 years. This is 1% lower than the state median of 41.1 years. With 32.8% of the population under 18, Old Greenwich has a notably young demographic profile, suggesting a family-oriented community.
Economy, Income & Housing
The median household income in Old Greenwich is $250,000+. This is 161% higher than the state median of $95,781. It is also 210% higher than the national median of $80,734. The poverty rate stands at 3.6%. This is 64% lower than the state poverty rate of 10.0%. This exceptionally low poverty rate indicates strong economic prosperity across the community. The unemployment rate is 4.6%. This is 18% lower than the state rate of 5.6%. The median home value is $1,844,700. Housing costs are 403% higher than the state median of $366,900. The home-value-to-income ratio of 7.4x suggests that housing affordability is a significant concern for many residents. 86.3% of occupied housing units are owner-occupied. This homeownership rate is 30% higher than the state average of 66.5%.
Race & Ethnicity
The largest racial or ethnic group in Old Greenwich is White (non-Hispanic), making up 76.5% of the population. Asian residents account for 9.2%. The Black or African American population (0.5%) is well below the state average of 9.8%. The Hispanic or Latino population (7.2%) is well below the state average of 18.3%. The Asian population is significantly higher than the state average (9.2% vs 4.8%).
Education
85.4% of residents aged 25 and older hold a bachelor's degree or higher. This places Old Greenwich in the top 10% of all cities in the state for educational attainment. This is 101% higher than the state rate of 42.5%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 99.0%. Notably, 39.5% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All demographic data for Old Greenwich, Connecticut is sourced from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates. The ACS collects data from approximately 3.5 million households annually and pools five years of responses so that even small communities can be measured, though the margin of error widens as the population falls. Comparisons are made against Connecticut state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 214 Census-designated places in Connecticut. Read more about how these figures are produced on our methodology page, or visit data.census.gov for official data.
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Frequently Asked Questions
What is the population of Old Greenwich, Connecticut?
Old Greenwich, Connecticut has a population of 6,936 according to the most recent U.S. Census ACS 5-Year Estimates.
What is the median household income in Old Greenwich, CT?
The median household income in Old Greenwich is $250,000+, which is 210% higher than the national median of $80,734.
What is the poverty rate in Old Greenwich, CT?
The poverty rate in Old Greenwich is 3.6%. This means approximately 252 residents live below the federal poverty line.
What is the racial makeup of Old Greenwich, Connecticut?
Old Greenwich's population is 76.5% White, 0.5% Black, 7.2% Hispanic/Latino, and 9.2% Asian.
What is the median home value in Old Greenwich, CT?
The median home value in Old Greenwich is $1,844,700. The home-value-to-income ratio is 7.4x.
How educated is Old Greenwich, Connecticut?
85.4% of adults (25+) in Old Greenwich hold a bachelor's degree or higher, and 39.5% hold a graduate or professional degree.