Cos Cob School

Cos Cob School is a public elementary school serving grades PK–05 in Cos Cob. It is one of 15 current school records connected to Greenwich School District. NCES reports 343 students for 2024–25.

Among 591 elementary schools in Connecticut with comparable records, this school is close in size to the reported median of 371 students. Its enrollment is at approximately the 41st percentile for that peer group. Size describes the campus, not instructional quality.

The reported student–teacher ratio is 10:1, below the Connecticut median of 12.2:1 for the same school level. This ratio uses total enrollment and teacher FTE; it is not an average classroom headcount and can be affected by special programs or part-time staffing.

The largest reported race and ethnicity groups are White (67.3%) and Hispanic or Latino (20.4%). English learners represent 10.9% of enrollment. Students served under IDEA represent 12.3%. These figures help families understand who the school serves; they are not rating inputs.

The 2021–22 civil-rights collection reports gifted and talented programming. Program availability changes, so families should confirm the current catalog and participation rules directly with the school.