Cos Cob School is a school servicing grades KG to 5 and is located in the district of "Greenwich School District" in Cos Cob, CT. There are a total of 434 students and 38 teachers at Cos Cob School, for a student to teacher ratio of 12 to 1.
Cos Cob School has an average proficiency test score (in mathematics and languages) of 73.0%, which is 39% higher than the Connecticut average.
| Students/Teachers | |
| Students | 434 |
| Teachers | 38 |
| Student/Teacher ratio | 12:1 |
| Advanced Placement | |
| AP enrollment | n/a |
| Taking some courses | n/a |
| Taking some courses (not tests) | n/a |
| Passing some courses | n/a |
| Passing no courses | n/a |
Advanced placement (AP) is a program that offers high school students the ability to take college level courses and exams. These programs were created to be at the same level of most first year university courses. If the students were successful in the AP programs, they could potentially receive advanced placement, credit or exemptions when they go on to university. At Cos Cob School, there are a total of n/a students enrolled in advanced placement courses, with n/a taking some courses.
| Grade | Proficiency |
| All | 74% |
| 3 | 75-79% |
| 4 | 65-69% |
| 5 | 75-79% |
| 6 | n/a |
| 7 | n/a |
| 8 | n/a |
| High School | n/a |
| Grade | Proficiency |
| All | 72% |
| 3 | 70-74% |
| 4 | 70-79% |
| 5 | 70-74% |
| 6 | n/a |
| 7 | n/a |
| 8 | n/a |
| High School | n/a |
The proficiency in math and languages tables represent the percentage of students that scored at or above the proficiency level on their standardized state assessment tests. Although these tests are standardized within each state, the tests may vary from state to state. Comparing the results of one state to another may not always be an accurate or fair comparison.
| Race | School | District | Connecticut | National |
| White | 68.2% | 66.2% | 58.5% | 51.1% |
| Black | 2.2% | 3.1% | 12.8% | 15.9% |
| Asian | 9.6% | 8.2% | 4.7% | 4.7% |
| Hispanic or Latino | 13.7% | 19.0% | 21.0% | 23.6% |
| American Indian and Alaskan | 0.0% | 0.2% | 0.4% | 1.2% |
| Hawaiian | 0.0% | 0.1% | 0.3% | 0.4% |
| Multiracial | 6.3% | 3.3% | 2.4% | 3.1% |
| Statistic | Cos Cob | Connecticut | National |
| Population | 7,065 | 3,565,287 | 328,239,523 |
| Population density (sq mi) | 3,283 | 736 | 91 |
| Median age | 42.1 | 40.6 | 37.7 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 62% | 54% | 55% |
| Speak English | 75% | 78% | 79% |
| Speak Spanish | 7% | 12% | 13% |
| Index | Cos Cob | Connecticut | National |
| Completed 8th grade | 96.5% | 88.0% | 84.3% |
| Completed high school | 96.1% | 86.9% | 83.0% |
| Completed some college | 83.7% | 62.9% | 59.4% |
| Completed associate degree | 73.3% | 45.5% | 38.5% |
| Completed bachelors | 66.5% | 38.0% | 30.3% |
| Completed masters | 34.5% | 16.8% | 11.5% |
| Completed professional degree | 6.3% | 4.6% | 3.3% |
| Completed doctorate | 2.2% | 1.7% | 1.3% |