Cos Cob CDP, Connecticut Demographics & Population 2026

Name: Cos Cob CDP, Connecticut Demographics
Creator: U.S. Census Bureau
License: https://www.census.gov/data/developers/about/terms-of-service.html

As of 2026, Cos Cob CDP, Connecticut has a total population of 7,354, the 47th largest city in Connecticut, with a median household income of $176,602, which is 88% higher than the state average. The poverty rate is 5.5%.

Key Takeaways

Household income is 88% above the state average — one of the wealthiest communities in Connecticut.

Cos Cob CDP Quick Facts

Population 7,354

Median Household Income $176,602

Median Home Value $1,149,500

Poverty Rate 5.5%

Unemployment Rate 6.1%

Median Age 39.3 years

Homeownership Rate 65.4%

Affordability Ratio 6.5x

Bachelor's Degree or Higher 70.3%

High School Graduation Rate 96.1%

Diversity Index 50/100

Population 7,354 47th of 215

Median Income $176,602 top 20%

Poverty Rate 5.5% 56% lower national

Median Home Value $1,149,500 top 10%

How Cos Cob CDP Compares

Median Household Income

Cos Cob CDP

$176,602

$93,760

National

$78,538

Median Home Value

Cos Cob CDP

$1,149,500

$343,200

National

$303,400

Economy & Housing

Household Income Distribution

Under $25K 4.2%

$25K-$50K 8.5%

$50K-$100K 14.5%

$100K+ 72.8%

Employment

6.1% Unemployment Rate State: 5.7% | National: 5.2%

72.3% Labor Force Participation

Housing Overview

Owner 65.4%

Renter 34.6%

Affordability Index Expensive

6.5x home value to income ratio

People & Demographics

Age Distribution

Under 18

29.0%

18-34

14.7%

35-54

28.5%

55-74

22.8%

75+

4.9%

Race & Ethnicity

Diversity Index

Moderate Diversity

Moderate diversity with one or two groups making up the majority.

State average: 56 | National average: 60

Education

Educational Attainment (Adults 25+)

Cos Cob CDP Rankings in Connecticut

#47 Population of 215

#41 Median Income of 215

#45 Education of 215

#20 Home Value of 215

Explore Connecticut Rankings

Cities by Population All cities ranked by size Richest Cities Ranked by median income Most Educated By bachelor's degree rate Most Affordable By housing affordability

Cities Similar to Cos Cob CDP

These cities in the same state have comparable population and economic profiles.

City	Population	Median Income	Home Value	Bachelor's+	Poverty
New Canaan CDP	7,032	$163,355	$1,115,600	76.6%	4.2%
Ridgefield CDP	7,103	$143,286	$843,200	73.1%	2.6%
Staples CDP	6,985	$218,365	$1,202,800	71.7%	3.8%
Glastonbury Center CDP	7,860	$133,450	$367,000	68.9%	5.8%
Old Greenwich CDP	6,904	$250,001	$1,668,200	84.3%	3.4%

Population Overview

Cos Cob CDP is a small city located in Connecticut. The total population is 7,354. It ranks as the 47th most populous out of 215 cities and towns in Connecticut.

Age Demographics

The median age in Cos Cob CDP is 39.3 years. This is 5% lower than the state median of 41.2 years. With 29.0% of the population under 18, Cos Cob CDP has a notably young demographic profile, suggesting a family-oriented community.

Economy, Income & Housing

The median household income in Cos Cob CDP is $176,602. This is 88% higher than the state median of $93,760. Compared to the national median of $78,538, household income here is 125% higher. The poverty rate stands at 5.5%. This is 45% lower than the state poverty rate of 10.0%. The unemployment rate is 6.1%. This is 7% higher than the state rate of 5.7%. The median home value is $1,149,500. Housing costs are 235% higher than the state median of $343,200. The home-value-to-income ratio of 6.5x suggests that housing affordability is a significant concern for many residents. 65.4% of occupied housing units are owner-occupied. This homeownership rate is 1% lower than the state average of 66.2%.

Race & Ethnicity

The largest racial or ethnic group in Cos Cob CDP is White (non-Hispanic), making up 67.2% of the population. Hispanic or Latino residents account for 14.2%. The Black or African American population (2.9%) is well below the state average of 9.9%.

Education

70.3% of residents aged 25 and older hold a bachelor's degree or higher. This is 68% higher than the state rate of 41.9%. Nationally, 35.0% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 96.1%. Notably, 36.9% of adults hold a graduate or professional degree, indicating a highly educated workforce.

Data Sources & Methodology

All demographic data for Cos Cob CDP, Connecticut is sourced from the U.S. Census Bureau's American Community Survey (ACS) 5-Year Estimates (2019-2023). The ACS collects data from approximately 3.5 million households annually, providing reliable estimates for communities of all sizes. Comparisons are made against Connecticut state averages and national averages calculated from the same dataset. Rankings reflect the city's position among all 215 Census-designated places in Connecticut. For official data, visit data.census.gov.

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Frequently Asked Questions

What is the population of Cos Cob CDP, Connecticut?

Cos Cob CDP, Connecticut has a population of 7,354 according to the most recent U.S. Census ACS 5-Year Estimates.

What is the median household income in Cos Cob CDP, CT?

The median household income in Cos Cob CDP is $176,602, which is 125% higher the national median of $78,538.

What is the poverty rate in Cos Cob CDP, CT?

The poverty rate in Cos Cob CDP is 5.5%. This means approximately 403 residents live below the federal poverty line.

What is the racial makeup of Cos Cob CDP, Connecticut?

Cos Cob CDP's population is 67.2% White, 2.9% Black, 14.2% Hispanic/Latino, and 5.4% Asian.

What is the median home value in Cos Cob CDP, CT?

The median home value in Cos Cob CDP is $1,149,500. The home-value-to-income ratio is 6.5x.

How educated is Cos Cob CDP, Connecticut?

70.3% of adults (25+) in Cos Cob CDP hold a bachelor's degree or higher, and 36.9% hold a graduate or professional degree.