Seattle-Tacoma-Bellevue, WA · WA
Mercer Island School District — Decoded Rankings
6 of 6 schools ranked · Updated 2026-05-29
District profile
- Total enrollment
- 2,554
- Free/reduced lunch
- 6.3%
- Avg SES index
- 97.0
- State
- WA
Schools in Mercer Island School District
Elementary / Middle Schools (5 ranked)
| Islander Middle SchoolNeighborhoodMercer Island School District | #64 | #7 | ★Strong by Both Measures | High | |
| Lakeridge Elementary SchoolNeighborhoodMercer Island School District | #9 | #54 | ★Strong by Both Measures | High | |
| Island Park ElementaryNeighborhoodMercer Island School District | #11 | #60 | ★Strong by Both Measures | High | |
| West Mercer ElementaryNeighborhoodMercer Island School District | #30 | #81 | ★Strong by Both Measures | High | |
| Northwood Elementary SchoolNeighborhoodMercer Island School District | #90 | #124 | ★Strong by Both Measures | High |
High Schools (1 ranked)
| Mercer Island High SchoolNeighborhoodMercer Island School District | #0 | #0 | — | Typical Profile | Insufficient |
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) | 94.1 | 50 | 44.1 points above the metro median |
| Avg decoded percentile (metro) | 85.6 | 50 | 35.6 points above the metro median |
| Avg rank shift (places gained after context) | -24.4 | 0 | Schools lose 24.4 places on average after context. |
Data & sources
- Assessment data
- 2024–25 school year
- NCES CCD vintage
- 2024
- 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 →