Skyline High School

Skyline High School is a large, comprehensive public school serving grades 9–12 in Sammamish, Washington, with 2,244 students in the relatively low-poverty Issaquah School District. The school ranks 23rd out of 396 Washington high schools for 2025–26, placing it in the 94th percentile, and has maintained a five-star rating in every reported ranking year. Its long-term record is particularly strong: it ranked between 9th and 15th statewide from 2020–21 through 2024–25.

Skyline’s strongest advantages are its consistency and completion outcomes. The 2024–25 graduation rate was 97.8%, and the dropout rate was just 0.7%—both better than district and state results. Its 2025–26 English Language Arts proficiency rate was 84.72%, well above the state’s 52.81% and nearly identical to Issaquah High School. Skyline’s math proficiency, 69.94%, was also substantially above the state rate, though it trailed the district average and nearby Eastlake High School, which ranked 6th statewide. Skyline’s graduation rate was slightly higher than Eastlake’s 96.8%, and its dropout rate was lower.

The main areas for parents to watch are math and especially science. Science proficiency fell from 82.95% in 2024–25 to 70.10% in 2025–26, while math also declined from 74.86% to 69.94%. Skyline’s 23.6:1 student-teacher ratio is higher than Eastlake’s and Issaquah’s, which may make individualized support more challenging in such a large school. Even so, subgroup results are generally strong, including a 99th-percentile ranking for low-income students and a 98th-percentile ranking for multiracial students; special education performance, at the 76th percentile, is a relative area for improvement. Compared with smaller specialized schools such as International School, Skyline may not lead every test category, but it offers an unusually strong combination of academic achievement, stability, and graduation success in a large comprehensive-school setting.