Cos Cob, Connecticut

Community · population 6,873 (2020 Census)

Median home: $1,210,400
Household income: $190,481
Jan low / Jul high: 22° / 85°
Snow a year: 34 in
Tornadoes ≤10 mi since 1950: 8
Median age: 39.6

Cos Cob is a community of 6,873 people, Connecticut. The median home is worth $1,210,400, above the typical Connecticut town ($376,000). It ranks better for young professionals than 93% of Connecticut towns, more seaside character than 90% of Connecticut towns, more walkable than 89% of Connecticut towns.

Cos Cob in our rankings:

#14 in The 25 Most Walkable Small Towns in Connecticut

How Cos Cob ranks

Percentile among Connecticut towns with at least 500 people on The Town Files lifestyle rankings. 50 is typical for the state; 90 means better than 90% of Connecticut towns.

The Town Files lifestyle rankings, built from federal demographic, school, crime and housing data (2025).

Homes and cost of living

The median home in Cos Cob is worth $1,210,400, above the typical Connecticut town ($376,000). Homes cost about 6.4 times the median household income of $190,481, which is more affordable than 7% of Connecticut towns. Median rent is $3,067 a month. 66.7% of households own their home.

Census ACS 5-year estimates, 2020–2024. "Typical town" = median of Connecticut towns with 500+ people.

Housing	Cos Cob	Typical Connecticut town
Median home value	$1,210,400	$376,000
Median rent	$3,067	$1,462
Median household income	$190,481	$109,167
Home value ÷ income	6.4×	3.6×
Homeownership	66.7%	80.3%
Median year built	1959	1969
Seasonal / vacation homes	0.8%	—

Who lives in Cos Cob

People	Cos Cob	Typical Connecticut town
Median age	39.6	45.0
Age 65 and over	15.5%	20.6%
Under 18	29.3%	—
Bachelor's degree or higher	70.2%	45.8%
Below the poverty line	5.6%	5.7%
Veterans	3.1%	—
Born outside the U.S.	25.2%	—
Work from home	30.0%	16.8%
Average commute	28.9 min	27.6 min
Homes with broadband	99.3%	93.8%

Weather in Cos Cob

July highs average 84.8°F and January lows 22.2°F. About 51.6 inches of rain and melted snow fall a year, with 34.0 inches of snow (typical Connecticut town: 39.0 in). Expect about 18 days a year at 90°F or hotter and 119 nights at or below freezing.

NOAA 1991–2020 climate normals: average daily high and low by month; precipitation and snowfall in inches. Temperatures from the Stamford 5 N station (5.8 mi away).

Tornadoes, storms and disasters

8 tornadoes have passed within 10 miles of Cos Cob since 1950, compared with 8 for the typical Connecticut town. 2 rated (E)F2 or stronger. The strongest, an F2, struck on July 12, 2006 about 6.6 miles from the town center. The most recent was on October 2, 2018.

NOAA Storm Events Database, tornado tracks (start to end point) passing within 10 miles of the town center, 1950–2026.

Hail of 1 inch or larger has been reported within 10 miles 12 times; the largest was 3.00 inches on August 1, 2011.

Public schools in Cos Cob

1 public school with 340 students, about 9.7 students per teacher.

School	Grades	Students	Per teacher
Cos Cob School	K-5	340	9.7

Towns near Cos Cob

Riverside, CT
1.3 mi · 8,843 people · home $1,900,300
Greenwich, CT
2.2 mi · 63,518 people · home $1,695,700
Greenwich, CT
2.3 mi · 13,836 people · home $1,515,700
Old Greenwich, CT
2.3 mi · 6,962 people · home $1,844,700
Stamford, CT
3.2 mi · 135,470 people · home $624,400
Glenville, CT
3.9 mi · 2,762 people · home $1,148,600
Pemberwick, CT
4.0 mi · 3,899 people · home $940,200
Byram, CT
4.6 mi · 4,493 people · home $838,400

Cos Cob questions

Is Cos Cob, Connecticut a good place to retire?

On The Town Files lifestyle rankings, Cos Cob scores better for retirees than 62% of Connecticut towns and quieter than 11%. 15.5% of residents are 65 or older (median age 39.6).

How much does a house cost in Cos Cob?

The median owner-occupied home in Cos Cob is valued at $1,210,400 (Census ACS 2020–2024), against a median household income of $190,481, so homes cost about 6.4 times income. Median rent is $3,067 a month.

What is the weather like in Cos Cob?

July highs average 84.8°F and January lows 22.2°F (NOAA 1991–2020 normals). It gets about 51.6 inches of precipitation a year and 34.0 inches of snow.

Does Cos Cob get tornadoes?

8 tornadoes have passed within 10 miles of Cos Cob since 1950 (NOAA Storm Events); the strongest was a F2 on July 12, 2006. The typical Connecticut town has had 8.

How this page is made. Every number comes from public data, matched to Cos Cob's Census boundary (GEOID 0917520). Comparisons use the median of Connecticut towns with at least 500 people. Weather comes from the nearest NOAA normals station; storm counts use NOAA tornado tracks within 10 miles of the town center.

U.S. Census Bureau, American Community Survey 5-year estimates (2020–2024)
U.S. Census Bureau, 2020 Census and 2025 Gazetteer (2020 / 2025)
NOAA NCEI U.S. Climate Normals (1991–2020)
NOAA NCEI Storm Events Database (1950–2026)
FEMA OpenFEMA Disaster Declarations (this product uses the FEMA OpenFEMA API but is not endorsed by FEMA) (1953–2026)
NCES Common Core of Data (2023–24)
BLS Quarterly Census of Employment and Wages; USDA ERS county unemployment (BLS LAUS) (2000–2024)
The Town Files lifestyle rankings, built from federal demographic, school, crime and housing data (2025)

Data snapshot 2026-11-13.