Old Greenwich, CT ZIP code
The ZIP code for Old Greenwich, Connecticut is 06870. It is in Fairfield County.
- Population in these ZIPs
- 7,864
- Avg. median income
- $250,000population-weighted
- Typical home value
- $2,700,100population-weighted
- Metro area
- Bridgeport-Stamford-Danbury, CT
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Old Greenwich, CT ZIP code list
| ZIP code | Population | Median income | Typical home value |
|---|---|---|---|
| 06870 | 7,864 | $250,001 | $2,700,100 |
Population and median household income: ACS 2020–2024 5-year estimates. Typical home value: Zillow Home Value Index (September 2026) where available, otherwise the ACS median owner-reported value. "PO Box" marks ZIP codes with no delivery area of their own. Methodology
Cities near Old Greenwich
Frequently asked questions
What is the ZIP code for Old Greenwich, CT?
The ZIP code for Old Greenwich, CT is 06870.
What county is Old Greenwich, Connecticut in?
Old Greenwich ZIP codes are in Fairfield County.