Census place · GEOID 0950576 · Fairfield County
New Canaan, CT ZIP codes
1 ZIP/ZCTA intersecting this Census place (CDP) in Fairfield County.
U.S. Census Bureau, ACS 2019–2023 5-year (vintage 2023). Geography: Census place New Canaan (GEOID 0950576). Methodology
Combined population of ZIP/ZCTAs intersecting this place: 20,704 (1 ZIPs).
Combined population of ZIP/ZCTAs intersecting this place. Each intersecting ZIP contributes its full ZCTA population; overlap percents are descriptive only. This is not the Census place ACS headline above. Methodology
Map of New Canaan, CT

ZIP/ZCTA overlap with New Canaan
Population overlap
Share of each ZIP/ZCTA’s population located within New Canaan, based on ZIP Code Database place-overlap data. This is a population measure, not land-area overlap or the Census-place population.
- 0684030.2%
USPS primary city
ZIP Code Database place-overlap table, field percent_of_zip_population_in_place, keyed by place_geoid. Not ACS 2019–2023. Overlap vintage is the shipped overlap table and is separate from ACS. Methodology
ZIP codes intersecting New Canaan
| ZIP | City | County | Population | Income |
|---|---|---|---|---|
| 06840 | New Canaan | Fairfield County | 20,704 | $250,000+ |
USPS associates these ZIPs with New Canaan
These codes list New Canaan as a primary or acceptable city. They are not used for the ACS headline.
| ZIP | City | County | Population | Income |
|---|---|---|---|---|
| 06842 | New Canaan | Fairfield County | — | — |