Residential delivery area · Connecticut
ZIP Code 06807: Cos Cob, CT
ZIP code 06807 is in Cos Cob, Connecticut, entirely in Fairfield County (Census 2020 ZIP-county file). About 7,700 people live there (Census Bureau, ACS 2020-2024). Median household income is $192,115 (Census Bureau, ACS 2020-2024). By Census place, 60% of its land lies in Cos Cob (a census-designated place); 40% is outside any Census place.
- ACS2020-24
- Census2020
- FHFA2023
- ZBP2023
- IRS2022
- Town
- Cos Cob · its only residential ZIP
- County
- Fairfield County
- Census places
- Cos Cob census-designated place
- House district
- CT-4 119th Congress
- State
- Connecticut
- Time zone
- Eastern
- Land area
- 3.3 sq mi · 2,336 people per sq mi
Where is ZIP code 06807?
06807 centers on 41.057°, -73.592° and covers 3.3 square miles of land plus 0.1 of water. It borders 4 ZIP codes: 06878, 06830, 06870, 06902.
The map draws ZIP code areas only. For the streets inside 06807, open its center on OpenStreetMap.
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries and the 2023 Gazetteer (2020 ZCTAs); ZIP-to-county shares, Census places and House districts (119th Congress) from the Census 2020 relationship files (shares of land); metro area from the OMB delineation (July 2023); town name and time zone from simplemaps US ZIP Codes (CC BY 4.0).
How does 06807 compare with the rest of Fairfield County?
| Measure | 06807 | In Fairfield County | In CT |
|---|---|---|---|
| People (ACS 2020-2024) | 7,650 | 43rd of 46 | 153rd of 288 |
| Median household income | $192k | 14th of 45 | 16th of 228 |
| Median home value | $1.44M | 8th of 46 | 8th of 245 |
Its median household income is higher than in 99% of U.S. residential ZIP codes, and it is denser than 86% of all U.S. residential ZIP codes. ZIP codes at the ACS caps ($250,000 or more for household income, $2,000,000 or more for home value) share the top rank.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B19013, B25077); ranks by PlainZIP over residential ZIP codes (ZCTAs).
How many people live in 06807?
The 2020 Census counted 7,197 people in 06807; the ACS, which samples households over 2020-2024, estimates 7,650. Between the 2010 and 2020 censuses its population grew 0.7% (its boundary stayed at least 90% the same).
- People, ACS 2020-2024
- 7,650±860 (90% margin)
- 2020 Census count
- 7,197+0.7% since 2010 (7,150)
- Households
- 2,828
- Median age
- 39.4
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01003, B01002, B11001); 2020 Census (DHC P1); 2010 Census (SF1 P1).
Who lives in 06807?
Of the 7,650 people the ACS estimates in 06807, 30.3% are under 18 and 15.4% are 65 or older. The largest group by race and Hispanic origin is White (not Hispanic) (60.6%), then Hispanic or Latino (14.3%).
- Under 1830.3%
- 18 to 6454.3%
- 65 and older15.4%
- White, not Hispanic60.6%
- Hispanic or Latino14.3%
- Other or two or more13.2%
- Asian, not Hispanic7.2%
- Black, not Hispanic4.8%
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B01001 age by sex, B03002 Hispanic or Latino origin by race); shares of the estimated population, small ZIP codes carry wide margins.
What do households in 06807 earn?
Median household income is $192,115 (ACS 2020-2024), the 14th highest of the 45 ranked ZIP codes in Fairfield County. It is not measurably different from 2015-2019 ($188,109 in 2024 dollars): the change is within the surveys' margins of error.
- Median household income
- $192,115±$28,835
- Income per person
- $111,328
- Below the poverty line
- 6.1%
- Unemployed (of the labor force)
- 5.6%
- Adults 25+ with a bachelor's degree
- 72.8%
- Adjusted gross income per tax return, 2022
- $336,9603,560 returns; wages 59% of AGI (IRS)
Source: U.S. Census Bureau, ACS 2020-2024 and 2015-2019 5-year estimates (B19013, B19301, B17001, B23025, B15003; 2015-2019 dollars converted with the BLS CPI-U, 1.22699); IRS Statistics of Income, ZIP code data, tax year 2022 (adjusted gross income per return, filed under the address on the return).
What are homes worth in 06807?
- Median home value (owners' estimate)
- $1,443,200
- Median gross rent
- $2,989
- Homes owned by their occupants
- 69.8%
- Housing units
- 2,938
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B25077, B25064, B25003, B25001); FHFA House Price Index, annual five-digit ZIP, updated 2026-03-31.
What businesses are in 06807?
243 business establishments had a location in this ZIP code in 2023, 11 more than in 2018; the most are in professional, scientific, and technical services (ZIP Code Business Patterns).
- Professional, scientific, and technical services32
- Construction31
- Health care and social assistance30
- Retail trade25
- Other services (except public administration)24
- Finance and insurance21
Source: U.S. Census Bureau, ZIP Code Business Patterns 2023 and 2018 (establishments with paid employees, by the business's ZIP code).
Which ZIP codes are next to 06807?
| ZIP | Town | People | Household income | Distance |
|---|---|---|---|---|
| 06878 | Riverside | 8,328 | $250k+ | 1.9 mi |
| 06830 | Greenwich | 24,880 | $147k | 2.1 mi |
| 06870 | Old Greenwich | 7,864 | $250k+ | 2.5 mi |
| 06902 | Stamford | 73,392 | $95k | 2.5 mi |
| 06901 | Stamford | 11,037 | $103k | 2.8 mi (near) |
| 06905 | Stamford | 20,725 | $137k | 3.3 mi (near) |
| 06906 | Stamford | 9,199 | $94k | 3.8 mi (near) |
| 06831 | Greenwich | 15,210 | $227k | 4.1 mi (near) |
Source: PlainZIP from the Census 2020 ZCTA boundaries (shared edges) and internal points; figures ACS 2020-2024.