B+
Above Average
79/100

Mercer Island High School

📚 09 – 12 🏫 High School
📍 9100 SE 42nd, Mercer Island, WA 98040
79
Repit Score
out of 100
1,465
Students
enrolled
19.6:1
Student:Teacher
ratio
$21K
Per Student
spending

What We Evaluated

👨‍🏫 Class Size 19.6:1 student-teacher ratio
💰 Funding $21,149 per student
🏫 School Type Regular

School Information

Address 9100 SE 42nd
City Mercer Island
ZIP Code 98040
District 5304980
NCES School ID 530498000761
Data Year 2024-25

Community Context for 98040

Understanding the community around Mercer Island High School helps evaluate the school environment and neighborhood.

💰 Income & Economy

Median Household Income $190,985
Per Capita Income $113,575
Poverty Rate 3.2%
Households Earning $100K+ 69.3%

🎓 Education Level

Bachelor's Degree or Higher 77.8%
High School or Higher 97.8%

🏠 Housing

Median Home Value $1,683,600
Median Rent $2,315
Owner-Occupied 68.0%
Renter-Occupied 32.0%
View full data for ZIP 98040 →

Thinking about moving into this school’s area? See what homes and rents actually cost in ZIP 98040 — values, rent, and how it compares to nearby ZIPs. Free, no signup. See 98040 housing costs →

Student Demographics

Enrollment and demographic breakdown for Mercer Island High School.

👫 Gender Distribution

Male 53.9%
Female 45.2%

🌎 Race & Ethnicity

White 53.2%
Asian 24.8%
Two or More Races 12.8%
Hispanic/Latino 6.6%
Black 1.4%
American Indian 0.1%
Pacific Islander 0.3%

📋 Enrollment Summary

Total Enrollment 1,465
Teachers (FTE) 74.6
Student:Teacher Ratio 19.6:1

Frequently Asked Questions

What is the Repit School Score for Mercer Island High School?
Mercer Island High School has a Repit School Score of 79 out of 100, earning a grade of B+. This score evaluates class size (student-teacher ratio), funding levels, and resources rather than just test scores.
How many students attend Mercer Island High School?
Mercer Island High School has 1,465 students enrolled for the 2024-25 school year. The student-to-teacher ratio is 19.6:1.
What grades does Mercer Island High School serve?
Mercer Island High School serves grades 09 – 12 and is classified as a High School. This is a public school.
How much funding does Mercer Island High School receive per student?
Mercer Island High School receives $21,149 in per-pupil spending from its district. This is above the national average.
🏠 Rental Market Around Mercer Island High School in 98040 ▼
Avg Home Value
$2,293,587
Avg Monthly Rent
$2,746
1-Year Change
+1.8%
% Renters
32.0%

Other Schools in 98040

A

Island Park Elementary

K – 05 • Elementary
Repit Score 91/100
A

Northwood Elementary School

Pre-K – 05 • Elementary
Repit Score 91/100
A

West Mercer Elementary

K – 05 • Elementary
Repit Score 91/100
A

Lakeridge Elementary School

K – 05 • Elementary
Repit Score 85/100
B+

Islander Middle School

06 – 08 • Middle
Repit Score 82/100
View all schools and real estate data for 98040 →

About Repit School Scores

Traditional school ratings rely heavily on standardized test scores, which often reflect family income more than actual school quality. Repit takes a different approach.

We evaluate schools based on factors that research shows actually impact educational outcomes:

  • Class Size — Smaller classes mean more individual attention and better student outcomes.
  • School Funding — Resources available for programs, teachers, and facilities directly affect education quality.
  • School Environment — School size and structure affect available programs and student experience.

Data source: NCES CCD 2024-25 | Last updated: September 2026