Seattle-Tacoma-Bellevue, WA · WA
Mercer Island School District — Decoded Rankings
6 of 6 schools ranked · Updated 2026-09-04
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)
| Rating | ||||||
|---|---|---|---|---|---|---|
| Lakeridge Elementary SchoolNeighborhoodMercer Island School District | #10 | #57 (WA)plausibly #37–118#34 (Seattle-Tacoma-Bellevue metro) | ★Strong by Both Measures | High | ||
| Island Park ElementaryNeighborhoodMercer Island School District | #13 | #113 (WA)plausibly #75–219#67 (Seattle-Tacoma-Bellevue metro)≈ tied with next | ★Strong by Both Measures | High | ||
| West Mercer ElementaryNeighborhoodMercer Island School District | #34 | #114 (WA)plausibly #66–276#68 (Seattle-Tacoma-Bellevue metro) | ★Strong by Both Measures | High | ||
| Islander Middle SchoolNeighborhoodMercer Island School District | #71 | #221 (WA)plausibly #169–321#131 (Seattle-Tacoma-Bellevue metro)≈ tied with next | ★Strong by Both Measures | High | ||
| Northwood Elementary SchoolNeighborhoodMercer Island School District | #103 | #244 (WA)plausibly #105–532#142 (Seattle-Tacoma-Bellevue metro) | ★Strong by Both Measures | High |
Rows marked ≈ are statistically tied with the row below them: on the current data the joint simulation gives the upper school less than a 65% chance of ranking above the lower one. Ties are between adjacent rows only.
High Schools (1 ranked)
| Rating | ||||||
|---|---|---|---|---|---|---|
| Mercer Island High SchoolNeighborhoodMercer Island School District | #1 | #12 (WA)HS#8 (Seattle-Tacoma-Bellevue metro) | HS outcome | Medium |
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) | 87.1 | 50 | 37.1 points above the metro median |
| Avg rank shift (places gained after context) | -47.6 | 0 | Schools lose 47.6 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
- September 4, 2026
- Methodology version
- 0.14.0
Source files (3)
- NCES CCD 2024 directory (Urban Institute) (accessed 2026-09-04)
- ACS 5-year 2020-2024 (accessed 2026-09-04)
- Washington OSPI 2024-25 school-level results (accessed 2026-09-04)
SchoolDecoder publishes context-adjusted residuals, not causal estimates. Decoded Rank is one signal — not a verdict on teaching quality. Read about limitations →