What grades does Mercer Island High School serve?

Mercer Island High School operates as a High school within the local district. The school serves families in the Mercer Island area.

Where is Mercer Island High School located?

Mercer Island High School is a urban school in Mercer Island, WA.

What is the student-teacher ratio at Mercer Island High School?

The student-teacher ratio at Mercer Island High School is 19.8:1. Lower ratios generally indicate smaller class sizes.

What schools are in Mercer Island, WA?

Schools in Mercer Island include Mercer Island High School and others operated by the local district. The district serves families throughout the Mercer Island area.

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Mercer Island High School — School Calendar 2026-27

High|Mercer Island, Washington|Mercer Island School District

Mercer Island, WA 98040

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School Profile

Grades

9–12

Enrollment

1,465

Student:Teacher

19.8:1

Locale

Suburban

District

Mercer Island School District

Econ. Disadvantaged

7.2%

Phone

(206)236-3345

School Statistics

Programs & Activities (SY 2021-22)

AP Program

29 courses offered

560 students enrolled

Gifted & Talented

266 students enrolled

Dual Enrollment

78 students enrolled

Athletics

5 sports, 53 teams

1,026 participants

Student-Teacher Ratio: 19.1:1

Worse than average in WA

Technology & Internet Access (SY 2021-22)

Wi-Fi

Campus-wide wireless

Fiber Internet

High-speed connection

1,516

Connected devices

Staff & Support Services (SY 2021-22)

Teachers (FTE)

75.34

100% fully certified

Counselors

4.9200001

Psychologists

1.48

Nurses

0.98000002

Anti-Bullying Policy

District Finance (FY 2023)

Per-Pupil Spending

$17,288

Total current expenditure

Instruction Spending

$9,912

Per pupil, classroom only

Total Revenue/Pupil

$21,977

All funding sources

Funding Sources

Federal 3%State 58%Local 40%

District-level data from NCES F-33 Survey

Community Context

Median Home Value

$740,211

-1.6% 1yr+25.7% 5yr

Seattle, WA metro area

Community Need Level

Moderate

CDC/ATSDR Social Vulnerability Index 2022

Neighborhood Indicators (Census Tract)

13.1%

Below 150% poverty line

4.5%

Unemployment rate

5.3%

Uninsured residents

6.4%

No HS diploma (25+)

Special Education (IDEA)

District-level data from IDEA Part B · Students ages 3-21 served under IDEA

Total Students Served

427

Ages 3-21 under IDEA

School-Age (6-21)

410

Receiving special ed services

Est. % of Enrollment

28%

District rate, school may vary

Disability Categories (District)

Specific Learning Disability

121 (30%)

Other Health Impairment

110 (27%)

Autism

83 (20%)

Speech/Language Impairment

49 (12%)

Emotional Disturbance

11 (3%)

Source: U.S. Department of Education, IDEA Section 618 Data · District-level counts · Individual school figures may differ

Enrollment Trend (2014-2025)

1,439

Current enrollment

Stable(-7% 5yr)

Frequently Asked Questions about Mercer Island High School

Enrollment at Mercer Island High School stands at 1,465 students. The school is a High institution in the local district.

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School profiles: Data from NCES Common Core of Data. Calendar events from district calendar sources, updated automatically. · How we verify this data