Top 12 charter schools in Washington (2025)
Publicly funded charter schools. Ranked by the Success Index (US) from official American data; 12 schools shown.
- 176Intergenerational High SchoolBellingham · Charter High23.4% Free/reduced-price lunch · 107 students
- 275Cascade Public SchoolsDes Moines · Charter High20.6% Free/reduced-price lunch · 126 students
- 361Summit Public School: SierraSeattle · Charter High47% Math proficiency · 214 students
- 461Summit Public School: OlympusTacoma · Charter High44.5% Math proficiency · 110 students
- 560Rainier PrepSeattle · Charter Middle62% Math proficiency · 359 students
- 659Pinnacles Prep Charter SchoolWenatchee · Charter Middle51.3% Free/reduced-price lunch · 234 students
- 758Summit Public School: AtlasSeattle · Charter High51% Math proficiency · 566 students
- 857Innovation High SchoolSpokane · Charter High33% Math proficiency · 232 students
- 950Impact Public SchoolsTacoma · Charter Elementary65.9% Free/reduced-price lunch · 232 students
- 1044Impact | Black River ElementaryRenton · Charter Elementary62.7% Free/reduced-price lunch · 209 students
- 1142Impact | Salish Sea ElementarySeattle · Charter Elementary66.8% Free/reduced-price lunch · 385 students
- 1239Impact Public SchoolsTukwila · Charter Elementary69.7% Free/reduced-price lunch · 505 students
| # | School | Sector | Success Index (US) | Key result | Students |
|---|---|---|---|---|---|
| 1 | Intergenerational High School Bellingham · High · Grades 9–12 | Charter | 75.5 Top 25% | 23.4% Free/reduced-price lunch | 107 |
| 2 | Cascade Public Schools Des Moines · High · Grades 9–12 | Charter | 74.5 Top 25% | 20.6% Free/reduced-price lunch | 126 |
| 3 | Summit Public School: Sierra Seattle · High · Grades 9–12 | Charter | 61.3 Top 50% | 47% Math proficiency | 214 |
| 4 | Summit Public School: Olympus Tacoma · High · Grades 9–12 | Charter | 60.6 Top 50% | 44.5% Math proficiency | 110 |
| 5 | Rainier Prep Seattle · Middle · Grades 5–8 | Charter | 60.3 Top 50% | 62% Math proficiency | 359 |
| 6 | Pinnacles Prep Charter School Wenatchee · Middle · Grades 6–10 | Charter | 58.7 Top 50% | 51.3% Free/reduced-price lunch | 234 |
| 7 | Summit Public School: Atlas Seattle · High · Grades 6–12 | Charter | 57.7 Top 50% | 51% Math proficiency | 566 |
| 8 | Innovation High School Spokane · High · Grades 9–12 | Charter | 56.5 Top 50% | 33% Math proficiency | 232 |
| 9 | Impact Public Schools Tacoma · Elementary · Grades PK–5 | Charter | 49.9 Lower 50% | 65.9% Free/reduced-price lunch | 232 |
| 10 | Impact | Black River Elementary Renton · Elementary · Grades K–5 | Charter | 44.2 Lower 50% | 62.7% Free/reduced-price lunch | 209 |
| 11 | Impact | Salish Sea Elementary Seattle · Elementary · Grades K–5 | Charter | 42.4 Lower 50% | 66.8% Free/reduced-price lunch | 385 |
| 12 | Impact Public Schools Tukwila · Elementary · Grades K–5 | Charter | 38.9 Lower 50% | 69.7% Free/reduced-price lunch | 505 |
Intergenerational High School in Bellingham leads the 2025 list of charter schools in Washington with a Success Index (US) of 75.5. Of the 12 schools shown, 12 are charter.
Scores are percentiles within school type, so a elementary school and a high school with the same score sit at the same point in their own distributions. Use the rankings to build a shortlist, then visit the schools and ask how they support students at your child's level.
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Frequently asked questions
What is the best charter school in Washington?
Intergenerational High School in Bellingham ranks first among charter schools in Washington with a Success Index (US) of 75.5 out of 100 (Enrollment: 107).
How are charter schools in Washington ranked?
Each school's Success Index (US) combines 4 factors: math proficiency (30%), reading proficiency (30%), community advantage (fewer free/reduced-price lunch) (25%), students per teacher (15%). Each factor is a percentile against schools of the same type across United States. Schools with fewer than 60 students are excluded from rankings.
Are these 2025 rankings official?
No. They are computed by Success Tutoring from official American data (Urban Institute Education Data Portal (NCES CCD, EDFacts); NCES Common Core of Data). States set their own assessments and proficiency cut scores, so proficiency rates are most comparable within a state. Use the state rankings for like-for-like comparisons.