Riverside School
Public · Grades K–5 · 440 students
Cos Cob School
300 East Putnam Ave., Cos Cob, CT 06807
Grades
Pre-K–5
Elementary
Students
343
Enrolled 2024–25
Students per teacher
10 : 1
Full-time teachers
District
Greenwich School District
Western Connecticut Planning Region
Schola Grade B · Above average
Letter grade (A–F) · compared with 546 Connecticut elementary schools · How we grade
Percentiles compare this school with other Connecticut elementary schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).
About Cos Cob School
Cos Cob School is a public elementary school in Cos Cob, Connecticut, serving grades Pre-K–5. It is part of Greenwich School District. The school is located in a large suburb in Western Connecticut Planning Region.
In the 2024–25 school year, 343 students were enrolled, with about 10 students for every full-time teacher. That ratio is smaller than the typical Connecticut elementary school (12.1 students per teacher). Its Schola Grade is B (above average), compared with 546 Connecticut elementary schools.
Grades & enrollment
Students per grade, 2024–25Grades Pre-K–5
Location & nearby schools
School details
- Type
- Public School · What this means
- Level
- Elementary
- Grades offered
- Pre-K–5
- Enrollment (2024–25)
- 343 students
- Students per teacher
- 10 to 1
- Charter school
- No
- Magnet school
- No
- Virtual learning
- Offers virtual courses
- Locale
- Suburb — Large
- School district
- Greenwich School District
- County
- Western Connecticut Planning Region
- NCES school ID
- 090171000296
Schools near Cos Cob School
All 1 schools in Cos Cob →
Julian Curtiss School
Magnet · Grades Pre-K–5 · 236 students
International School At Dundee
Magnet · Grades K–5 · 342 students
North Mianus School
Public · Grades K–5 · 423 students
North Street School
Public · Grades Pre-K–5 · 411 students
Old Greenwich School
Public · Grades Pre-K–5 · 385 students
School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.