Summary:
ZIP code 98027 has two public high schools serving grades 9–12: Issaquah High School and Gibson Ek High School, both part of the highly rated Issaquah School District, which ranks third among Washington districts.
Issaquah High School is the larger, comprehensive high school, enrolling 2,419 students and ranking 17th of 396 Washington high schools, in the 96th percentile. It offers the strongest overall academic profile in the area, with 2025–26 proficiency rates of 84.92% in English language arts and 72.38% in math. Its 2024–25 graduation rate was 94.9%, and its dropout rate was just 1.3%. The school’s math performance was slightly below the district average but still well above the state average. Its student–teacher ratio is 21.9:1, and its large size may support a broad range of courses, activities, and programs.
Gibson Ek High School is a much smaller school with 198 students, a 18.0:1 student–teacher ratio, and a distinctive small-school environment. It ranks 51st statewide, in the 87th percentile. Its ELA proficiency rose substantially to 81.40% in 2025–26, exceeding both district and state averages. Math is the clearest area of contrast: 45.24% of students were proficient, only slightly above the state rate and far below the district’s 75.78%. Both schools had strong 2024–25 science results, but current science data are suppressed. Gibson Ek’s current graduation and dropout rates are also unavailable, so those outcomes cannot be directly compared with Issaquah High.
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