Chief Sealth International High School

2600 SW Thistle, Seattle, WA 98126

CSchola Grade
Grades
9–12
High
Students
1,184
Enrolled 2024–25
Students per teacher
18.8 : 1
Full-time teachers
District
Seattle School District No. 1
King County

Schola Grade C · Average

Letter grade (A–F) · compared with 338 Washington high schools · How we grade
Test scores50% proficient in math & reading
53rdpercentile
Equity40% of low-income students proficient
56thpercentile
Attendance49% chronically absent
24thpercentile
Graduation rate92% graduate in 4 years
61stpercentile
College readinessAt least 21% take AP, IB or dual-enrollment courses
34thpercentile
Class size18.8 students per teacher
65thpercentile

Percentiles compare this school with other Washington high schools; the line marks the middle. Data: test scores 2021–22, graduation and absenteeism 2022–23 (U.S. Department of Education, EDFacts); coursework 2023–24 (Civil Rights Data Collection); staffing 2024–25 (NCES).

About Chief Sealth International High School

Chief Sealth International High School is a public high school in Seattle, Washington, serving grades 9–12. It is part of Seattle School District No. 1. The school is located in a large city in King County.

In the 2024–25 school year, 1,184 students were enrolled, with about 18.8 students for every full-time teacher. That ratio is close to the typical Washington high school (19.2 students per teacher). Its Schola Grade is C (average), compared with 338 Washington high schools.

Grades & enrollment

Students per grade, 2024–25Grades 9–12

Location & nearby schools

2600 SW Thistle
Seattle, WA 98126
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School details

Type
Public School · What this means
Level
High
Grades offered
9–12
Enrollment (2024–25)
1,184 students
Students per teacher
18.8 to 1
Charter school
No
Magnet school
No
Virtual learning
Offers virtual courses
Locale
City — Large
School district
Seattle School District No. 1
County
King County
NCES school ID
530771001149

Schools near Chief Sealth International High School

All 213 schools in Seattle →

School data comes from the U.S. Department of Education: the National Center for Education Statistics (NCES) Common Core of Data and EDGE school locations (2024–25) and Private School Survey (2023–24), the Civil Rights Data Collection (2023–24), and EDFacts (test results 2021–22; graduation and chronic absenteeism 2022–23), plus other public sources. Please contact the school to confirm enrollment, programs, and other details. How we source data.