Best Public Schools in Cos Cob, CT

Summary:

The city of Cos Cob, Connecticut is home to a single elementary school, the Cos Cob School, which serves grades K-5 and is part of the highly-ranked Greenwich School District. The Cos Cob School is a strong-performing institution, consistently ranking in the top third of Connecticut elementary schools and exceeding the state average on standardized tests in English Language Arts and Mathematics, though slightly below the district average.

With a relatively low chronic absenteeism rate of 17.7% and a student-teacher ratio of 9.4 to 1, the Cos Cob School appears to provide a supportive learning environment for its 340 students. The school's high per-student spending of $22,254 is likely a reflection of the affluence of the Greenwich School District, which is ranked 16th out of 156 districts in the state and has a 5-star rating from SchoolDigger.

While the Cos Cob School's academic performance is strong, the school's demographics suggest that it may not be serving a socioeconomically diverse student population, with only 14.12% of students qualifying for free or reduced-price lunch. This could be an area for further investigation to ensure equitable access to educational opportunities for all students in the Cos Cob community.

Choose columns to see: Summary School Students/Teachers Ranking Test Scores Finance All

School													Students/Teachers											Ranking (2025)				Ranking (2024)				SBAC English Language Arts (2025)			SBAC Mathematics (2025)			Per Pupil Expenditures (2025)
Name	Type	Grades	Address	City	Zip	County	District	Is Charter	Is Magnet	Is Virtual	Is Title I	Phone	Enrollment	Full-time Teachers	Student/ Teacher Ratio	Free/Discounted Lunch Recipients	White	Black	Hispanic	Asian	American Indian	Pacific Islander	Two or More Races	Average Standard Score (2025)	Statewide Rank (2025)	State Percentile (2025)	SchoolDigger Rating (2025)	Average Standard Score (2024)	Statewide Rank (2024)	State Percentile (2024)	Rank Change from Previous Year	SBAC English Language Arts 3rd Grade	SBAC English Language Arts 4th Grade	SBAC English Language Arts 5th Grade	SBAC Mathematics 3rd Grade	SBAC Mathematics 4th Grade	SBAC Mathematics 5th Grade	Total
Cos Cob School	Public	PK, KG-5	300 East Putnam Ave.	Cos Cob	06807	Western Connecticut Planning Region	Greenwich School District	No	No	No	No	(203) 869-4670	343	34	10.0	16.0%	231 (67.3%)	4 (1.2%)	70 (20.4%)	18 (5.2%)	2 (0.6%)	0 (0.0%)	18 (5.2%)	73	156^th of 493 public elementary schools	68.4%		72	159^th of 497 public elementary schools	68.0%	3	58.3	66.0	61.7	73.3	72.3	61.7	$30,090

Cities Near Cos Cob

City	Distance	# of Schools	Statewide Rank
Riverside	0.69 mi	4	4^th
Greenwich	0.83 mi	9	32^nd
Stamford	1.6 mi	23	148^th
Old Greenwich	1.81 mi	1	2^nd
Darien	4.51 mi	7	6^th

See the top CT Connecticut cities

SchoolDigger data sources: National Center for Education Statistics, U.S. Department of Education, the U.S. Census Bureau and the Connecticut Department of Education.

IMPORTANT DISCLAIMERS: Not all boundaries are included. We make every effort to ensure that boundaries are up-to-date. But it's important to note that these are approximations and are for general informational purposes only. To verify legal descriptions of boundaries or school locations, contact your local tax assessor's office and/or school district.