Serving 359 students in grades Prekindergarten-5, Cos Cob School ranks in the top 20% of all schools in Connecticut for overall test scores (math proficiency is top 20%, and reading proficiency is top 20%).
The percentage of students achieving proficiency in math is 60-64% (which is higher than the Connecticut state average of 39%). The percentage of students achieving proficiency in reading/language arts is 65-69% (which is higher than the Connecticut state average of 51%).
The student:teacher ratio of 11:1 is lower than the Connecticut state level of 12:1.
Minority enrollment is 37% of the student body (majority Hispanic), which is lower than the Connecticut state average of 51% (majority Hispanic).
Quick Stats (2024)
- Grades: Prekindergarten-5
- Enrollment: 359 students
- Student:Teacher Ratio: 11:1
- Minority Enrollment: 37%
- Overall Testing Rank: Top 20% in CT
- Math Proficiency: 60-64% (Top 20%)
- Reading Proficiency: 65-69% (Top 30%)
- Source: National Center for Education Statistics (NCES), CT Dept. of Education
Top Rankings
Cos Cob School ranks among the top 20% of public schools in Connecticut for:
Category
Attribute
Overall Rank
Math Proficiency
Student Attention
School Overview
Cos Cob School's student population of 359 students has declined by 12% over five school years.
The teacher population of 32 teachers has declined by 8% over five school years.
Grades Offered
Grades Prekindergarten-5
(offers virtual instruction)
(offers virtual instruction)
Total Students
359 students
Gender %
Total Classroom Teachers
32 teachers
Students by Grade
School Rankings
Cos Cob School ranks within the top 20% of all 940 schools in Connecticut (based off of combined math and reading proficiency testing data).
The diversity score of Cos Cob School is 0.56, which is less than the diversity score at state average of 0.66. The school's diversity has stayed relatively flat over five school years.
Overall Testing Rank
#181 out of 940 schools
(Top 20%)
(Top 20%)
Math Test Scores (% Proficient)
60-64%
39%
Reading/Language Arts Test Scores (% Proficient)
65-69%
51%
Student : Teacher Ratio
11:1
12:1
American Indian
n/a
n/a
Asian
10%
5%
Hispanic
19%
29%
Black
n/a
13%
White
63%
49%
Hawaiian
n/a
n/a
Two or more races
8%
4%
All Ethnic Groups
Eligible for Free Lunch
14%
34%
Eligible for Reduced Lunch
1%
6%
School Statewide Testing
School District Name
Source: 2021-2022 (latest school year available) National Center for Education Statistics (NCES), CT Dept. of Education
Frequently Asked Questions
What is Cos Cob School's ranking?
Cos Cob School is ranked #181 out of 940 schools, which ranks it among the top 20% of public schools in Connecticut.
What schools are Cos Cob School often compared to?
Cos Cob Schoolis often viewed alongside schools like International School At Dundee by visitors of our site.
What percent of students have achieved state testing proficiency in math and reading?
60-64% of students have achieved math proficiency (compared to the 39% CT state average), while 65-69% of students have achieved reading proficiency (compared to the 51% CT state average).
How many students attend Cos Cob School?
359 students attend Cos Cob School.
What is the racial composition of the student body?
63% of Cos Cob School students are White, 19% of students are Hispanic, 10% of students are Asian, and 8% of students are Two or more races.
What is the student:teacher ratio of Cos Cob School?
Cos Cob School has a student ration of 11:1, which is lower than the Connecticut state average of 12:1.
What grades does Cos Cob School offer ?
Cos Cob School offers enrollment in grades Prekindergarten-5 (offers virtual instruction).
What school district is Cos Cob School part of?
Cos Cob School is part of Greenwich School District.
School Reviews
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