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US ZIP Code Profile

ZIP Code 06807
Cos Cob, Connecticut

ZIP code 06807 is in Cos Cob, located in Fairfield County, Connecticut, within the Bridgeport-Stamford-Norwalk metro area. Its 2020 Census population was 7,197. The estimated median adjusted gross income per tax return is $125,000, and about 37% of filers report $200,000 or more.

2020 Population
7,197
Census ZCTA
County
Fairfield
FIPS 09001
Median income (est.)
$125,000
IRS SOI 2022
Land Area
3.145 mi²
+ 0.128 mi² water

01Location & Geography

Authoritative geographic identifiers from the U.S. Census Bureau, ANSI, and FIPS standards.

Primary CityCos Cob, CT
CountyFairfield County (FIPS 09001)
StateConnecticut (FIPS 09)
Metro Area (MSA)Bridgeport-Stamford-Norwalk, CT Metro Area (14860)
Census Region / DivisionNortheast Region · New England Division
Coordinates41.056732, -73.592026
Land / Water Area3.145 mi² land · 0.128 mi² water

02Income & Economics

Distribution of the 3,560 individual tax returns filed in 06807 by adjusted gross income bracket (IRS SOI, 2022).

< $25K
18.5%
$25K–$50K
9.8%
$50K–$75K
8.4%
$75K–$100K
8.7%
$100K–$200K
18.0%
$200K+
36.5%
The $200,000+ bracket accounts for 87% of 06807's total adjusted gross income, from 37% of returns — a concentration that drives the gap between the median ($125,000) and the average.
Estimated median = median adjusted gross income per tax return, interpolated from IRS SOI brackets. Differs from U.S. Census household income.

03Income Over Time

Year-over-year change in 06807's IRS income metrics, 2020–2022.

Median income (2021→2022)
$125,000
▲ 2.6%
Filers earning $200K+
36.5%
▲ 0.4 pt
Total filers
3,560
▲ 2.0%
GET /zipc/v2/zipcodes/06807/soi?year=… $98K 2020 $122K 2021 $125K 2022
Median = adjusted gross income per return, interpolated from IRS SOI brackets. Figures are nominal (not inflation-adjusted).

04Population Trend

Decennial U.S. Census population for the 06807 ZCTA.

2000
6,751
 
2010
7,150
▲ +5.9%
2020
7,197
▲ +0.7%

05Nearby ZIP Codes — Live Radius Search

Drag the slider to filter ZIP codes by distance from 06807. Powered by the same radius endpoint developers call from the API.

GET /zipc/v2/radius

ZIP codes within range of 06807

Cos Cob and its immediate neighbors, sorted by distance.

3 mi
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Distance from 06807 to any ZIP

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06USPS Postal Details

Delivery and facility attributes from the monthly USPS dataset.

ZIP ClassificationNon-Unique Zip
Facility TypePost Office
Carrier Route SortD
USPS Finance Number081564
City AliasesCos Cob

07Frequently Asked Questions

What county is ZIP code 06807 in?

ZIP code 06807 is in Fairfield County, Connecticut (county FIPS code 09001).

What city is ZIP code 06807?

The primary USPS city for 06807 is Cos Cob, CT.

What metro area (MSA) is 06807 in?

06807 is part of the Bridgeport-Stamford-Norwalk, CT Metro Area (MSA code 14860).

What is the population of ZIP code 06807?

The 2020 Census population of 06807 was 7,197 residents.

What is the median income in ZIP code 06807?

Based on IRS Statistics of Income data, the estimated median adjusted gross income per tax return in 06807 is about $125,000, with around 37% of filers reporting $200,000 or more. Note that adjusted gross income is a tax measure and differs from U.S. Census household income.