Seattle-Tacoma-Bellevue, WA · WA
Mercer Island School District — Decoded Rankings
6 of 6 schools ranked · Updated 2026-05-29
District profile
- Total enrollment
- 2,510
- Free/reduced lunch
- —
- Avg SES index
- 95.3
- State
- WA
Schools in Mercer Island School District
Elementary / Middle Schools (5 ranked)
| Islander Middle SchoolEnrollment unknownMercer Island School District | #90 | #9 | ★Strong by Both Measures | High | |
| Northwood Elementary SchoolEnrollment unknownMercer Island School District | #50 | #16 | ★Strong by Both Measures | High | |
| Island Park ElementaryEnrollment unknownMercer Island School District | #7 | #46 | ★Strong by Both Measures | High | |
| Lakeridge Elementary SchoolEnrollment unknownMercer Island School District | #8 | #53 | ★Strong by Both Measures | High | |
| West Mercer ElementaryEnrollment unknownMercer Island School District | #29 | #72 | ★Strong by Both Measures | High |
High Schools (1 ranked)
| Mercer Island High SchoolEnrollment unknownMercer Island School District | #1 | #2HS | HS outcome | HS pool |
Story type breakdown
- 0Outperforming Expectations
- 5Strong by Both Measures
- 0High Scores, Context Matters
- 0Typical Profile
- 0Lower by Both Measures
How this district compares
District-level averages relative to the Seattle-Tacoma-Bellevue, WA metro median.
| Measure | District avg | Metro median | Read |
|---|---|---|---|
| Avg achievement percentile (metro) | 94.7 | 50 | 44.7 points above the metro median |
| Avg decoded percentile (metro) | 89.3 | 50 | 39.3 points above the metro median |
| Avg rank shift (places gained after context) | -2.4 | 0 | Schools lose 2.4 places on average after context. |
Data & sources
- Assessment data
- 2023–24 school year
- NCES CCD vintage
- 2023
- Census ACS 5-year vintage
- 2020-2024
- Last updated
- May 29, 2026
- Methodology version
- 0.2.0
SchoolDecoder publishes context-adjusted residuals, not causal estimates. Decoded Rank is one signal — not a verdict on teaching quality. Read about limitations →