Mercer Island High School is a school servicing grades 9 to 12 and is located in the district of "Mercer Island School District" in Mercer Island, WA. There are a total of 1,521 students and 76 teachers at Mercer Island High School, for a student to teacher ratio of 21 to 1.
Mercer Island High School has an average proficiency test score (in mathematics and languages) of 94.5%, which is 76% higher than the Washington average.
| Students/Teachers | |
| Students | 1521 |
| Teachers | 76 |
| Student/Teacher ratio | 21:1 |
| Advanced Placement | |
| AP enrollment | 496 |
| Taking some courses | 359 |
| Taking some courses (not tests) | 126 |
| Passing some courses | 285 |
| Passing no courses | 70 |
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 Mercer Island High School, there are a total of 496 students enrolled in advanced placement courses, with 359 taking some courses.
| Grade | Proficiency |
| All | 90% |
| 3 | n/a |
| 4 | n/a |
| 5 | n/a |
| 6 | n/a |
| 7 | n/a |
| 8 | n/a |
| High School | 90% |
| Grade | Proficiency |
| All | 99% |
| 3 | n/a |
| 4 | n/a |
| 5 | n/a |
| 6 | n/a |
| 7 | n/a |
| 8 | n/a |
| High School | >= 99% |
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 | Washington | National |
| White | 71.6% | 69.7% | 57.7% | 51.1% |
| Black | 1.8% | 1.4% | 4.6% | 15.9% |
| Asian | 20.3% | 18.6% | 7.3% | 4.7% |
| Hispanic or Latino | 3.1% | 3.9% | 21.1% | 23.6% |
| American Indian and Alaskan | 0.5% | 0.3% | 1.4% | 1.2% |
| Hawaiian | 0.1% | 0.3% | 1.0% | 0.4% |
| Multiracial | 2.5% | 5.8% | 6.9% | 3.1% |
| Statistic | Mercer Island | Washington | National |
| Population | 25,820 | 7,614,893 | 328,239,523 |
| Population density (sq mi) | 4,045 | 117 | 91 |
| Median age | 45.9 | 37.6 | 37.7 |
| Male/Female ratio | 0.9:1 | 1.0:1 | 1.0:1 |
| Married (15yrs & older) | 70% | 56% | 55% |
| Speak English | 78% | 81% | 79% |
| Speak Spanish | 3% | 8% | 13% |
| Index | Mercer Island | Washington | National |
| Completed 8th grade | 98.2% | 87.5% | 84.3% |
| Completed high school | 98.1% | 86.6% | 83.0% |
| Completed some college | 92.9% | 67.7% | 59.4% |
| Completed associate degree | 82.9% | 43.3% | 38.5% |
| Completed bachelors | 78.2% | 33.6% | 30.3% |
| Completed masters | 36.7% | 12.3% | 11.5% |
| Completed professional degree | 14.8% | 3.6% | 3.3% |
| Completed doctorate | 4.1% | 1.5% | 1.3% |