Who lives in Greenwich?
The age breakdown of Greenwich, CT, how many residents were born in the state or outside the U.S., the languages spoken at home, and how all of it compares with the county, the state and the nation.
U.S. Census Bureau, American Community Survey 5-year estimates, tables B01001, B01002, B05002 and C16001.
This story was assembled using AI and public data sources.
The people of Greenwich, by the numbers.
Median age: 44.0 yrs — U.S.: 38.7 yrs
Share of residents by age
- Under 18: 22.9
- 18–24: 6.6
- 25–34: 10.6
- 35–44: 10.4
- 45–54: 13.6
- 55–64: 15.7
- 65–74: 12.2
- 75+: 8
Born in this state: 31% — Born outside the U.S.: 21.6%
Languages spoken at home (share of residents 5+)
- Spanish: 8.7
- Other Indo-European: 4.4
- Chinese: 2.9
- French / Haitian: 2.3
- Korean: 0.7
- German / West Germanic: 0.5
Median age (years)
- Greenwich: 44
- Western Connecticut Planning Region: 41.5
- CT: 41.2
- U.S.: 38.7
What it means
Half of residents here are older than 44.0 — 5.3 years above the national median.
About 23% of residents are under 18 and 20% are 65 or older.
31% of people living here were born in CT, and 21.6% were born outside the United States (U.S.: 13.9%).
76% of residents 5 and older speak only English at home.
All shares are drawn from a population of about 14,528.
Sources
- U.S. Census Bureau — American Community Survey (ACS) 5-year estimates — Population, income, housing, education, commuting and poverty figures
- Census Bureau API — ACS Detailed Tables — The endpoint these pages are generated from
- data.census.gov — Look up the same tables for any place yourself
- ACS accuracy statement — Estimates carry margins of error; small places vary the most
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