Mercer Island High School
Reported Enrollment
1,524
students
District
Mercer Island School District
County Context Score
54/100
county-level composite, not a school rating
School Information
Address
9100 SE 42nd, Mercer Island, WA, 98040
School District
Mercer Island School District
NCES Identifiers
- School ID
- 530498000761
- District ID
- 5304980
NCES 2022-23 public school data and FY 2022 school-finance data
Grade Range
9–12
High · Regular
Enrollment
1,524 students
School Setting
Suburb: Large
School profile guide
How to use this school record
This page is designed for first-pass public-school research. It combines the school record, district context, nearby comparable schools, and county-level school signals so you can decide what to verify next.
What is covered in this record
3 of 5 optional NCES detail groups are available for this school: enrollment, student-teacher ratio, lunch eligibility, grade span, and school setting. Missing fields mean the source did not provide a usable value in the current build.
Use this as an NCES profile
Mercer Island High School is shown from federal public-school records. Treat the page as a source-backed profile for enrollment, grade span, school type, district context, and county context where fields are reported.
Separate proximity from assignment
Addresses, district boundaries, transfer rules, and program eligibility can change locally. Confirm attendance assignment with the district before making enrollment decisions.
Compare the surrounding system
King County has 537 public schools in the current county list. Review the county page and district context before judging one school in isolation.
This district context includes 6 schools. Similar-school links show 5 peer records when available.
Compare before choosing
What Mercer Island High School tells a parent
This profile is most useful when it is read against the local system: Mercer Island School District, King County, and comparable high schools.It does not replace local assignment rules, tours, or program verification.
Decision notes
- 9–12 is the first fit check. Verify that the grade span matches the years your student needs, especially around transition grades.
- Regular school type affects comparison. Compare it with other high schools before treating it like a one-for-one substitute.
- Suburb: Large matters for daily life. Use the locale and address as a starting point, then confirm commute, boundary, and transportation details locally.
What this page cannot confirm
SchoolsByCounty does not verify attendance assignment, transportation, transfer eligibility, special-program admission, test scores, discipline records, or campus climate for Mercer Island High School. Treat this as a public-data profile and confirm local fit with Mercer Island School District.
1,524 students
Mercer Island High School reports 1,524 students, larger than most same-level county peers. Among 116 other high schools in King County with enrollment data, 88 report fewer students and 28 report more. The peer median is 357 students.
117 high schools
The same-level county median enrollment is 385 students. Use it to separate unusually small or large schools from typical peers.
6 district schools
Mercer Island School District lists 4 primary, 1 middle, 1 high schools in the current NCES data. For a high-school choice, compare graduation context, program access, commute, and nearby alternatives before using one enrollment number as the deciding signal.
District grade-span map
Use the district mix to see whether this school is part of a fuller local pathway or a narrower placement.
Primary
4
Middle
1
High
1
Other
0
Nearby context inside Mercer Island School District
Same-level peers to open next
School Profile FAQ
Is Mercer Island High School a recommended school?
No. SchoolsByCounty publishes public-school records and county context, not school recommendations. Use this profile as a starting point, then verify fit and assignment with Mercer Island School District.
Does this page confirm attendance assignment for Mercer Island High School?
No. Attendance zones, transfers, magnet programs, and eligibility rules are set locally. Confirm assignment with the district or official local boundary tools before making enrollment decisions.
Where does the Mercer Island High School data come from?
The school record is based on NCES public school data where fields are available, including school name, district, grade span, school type, enrollment, and related public-school indicators.
How should I compare Mercer Island High School with nearby schools?
Mercer Island High School should be compared with 117 high schools in King County, plus other schools in Mercer Island School District. Start with grade span, reported enrollment, school type, district pathway, and local assignment rules.
What should I verify before moving for Mercer Island High School?
Before using Mercer Island High School in a housing decision, verify attendance boundaries, transportation, transfer rules, program eligibility, and current enrollment procedures with Mercer Island School District.
Part of Mercer Island School District
Mercer Island High School is one of 6 schools in this district, serving a reported enrollment of 4,057 students across 6 schools.
Open the district guideSchools in District
6
Reported Enrollment
4,057
6 schools reporting
Other Schools in This District
- Island Park ElementaryKG–5 · PrimaryListed only
- Lakeridge Elementary SchoolKG–5 · PrimaryListed only
- Islander Middle School6–8 · MiddleListed only
- West Mercer ElementaryKG–5 · PrimaryListed only
- Northwood Elementary SchoolPK–5 · PrimaryListed only
Similar Schools
King County Schools
County Context Score
54/100
County-level composite across 537 public schools
Data Sources
Education data sourced from the National Center for Education Statistics (NCES) Common Core of Data and School District Finance Survey. School scores are derived composite metrics based on available NCES graduation-rate and school-finance signals.
Data is informational only. Coverage varies by county and reporting year. Not for use as the sole basis for educational decisions.