For the 2025 school year, there are 9 public charter schools serving 2,517 students in King County, WA. The top ranked public charter schools in King County, WA are Impact Schools, Rainier Prep and Summit School Sierra. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
King County, WA public charter schools have an average math proficiency score of 34% (versus the Washington public charter school average of 38%), and reading proficiency score of 51% (versus the 54% statewide average). Charter schools in King County have an average ranking of 4/10, which is in the bottom 50% of Washington public charter schools.
Minority enrollment is 83% of the student body (majority Black), which is more than the Washington public charter school average of 66% (majority Black).
Best Charter Schools in King County (2025)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Grades
Students
Rank: #11.
Impact Schools
Charter School
(Math: 50-54% | Reading: 55-59%)
Rank:
Rank:
8/
Top 30%10
3438 S. 148th Street
Seattle, WA 98168
(206) 712-7640
Seattle, WA 98168
(206) 712-7640
Grades: K-5
| 478 students
Rank: #22.
Rainier Prep
Charter School
(Math: 38% | Reading: 51%)
Rank:
Rank:
6/
Top 50%10
10211 12th Ave S
Seattle, WA 98168
(206) 494-5979
Seattle, WA 98168
(206) 494-5979
Grades: 5-8
| 333 students
Rank: #33.
Summit School Sierra
Charter School
(Math: 25-29% | Reading: 60-64%)
Rank:
Rank:
6/
Top 50%10
1025 S King St
Seattle, WA 98134
(206) 453-2520
Seattle, WA 98134
(206) 453-2520
Grades: 9-12
| 221 students
Rank: #44.
Summit School Atlas
Charter School
(Math: 34% | Reading: 52%)
Rank:
Rank:
5/
Bottom 50%10
9601 35th Avenue Sw
Seattle, WA 98126
(206) 307-7645
Seattle, WA 98126
(206) 307-7645
Grades: 6-12
| 545 students
Rank: #55.
Summit School Olympus
Charter School
(Math: ≤10% | Reading: 50-59%)
Rank:
Rank:
3/
Bottom 50%10
409 Puyallup Ave
Seattle, WA 98134
(253) 444-9781
Seattle, WA 98134
(253) 444-9781
Grades: 9-12
| 148 students
Rank: #66.
Rainier Valley Leadership Academy
Charter School
(Math: 6-9% | Reading: 25-29%)
Rank:
Rank:
1/
Bottom 50%10
6020 Rainier Avenue S
Seattle, WA 98118
(206) 659-0956
Seattle, WA 98118
(206) 659-0956
Grades: 6-12
| 163 students
Rank: n/an/a
Cascade Schools
Magnet School
Charter School
Charter School
22419 Pacific Highway South
Seattle, WA 98198
(253) 271-8629
Seattle, WA 98198
(253) 271-8629
Grades: 9-12
| 193 students
Rank: n/an/a
Impact Black River Elementary School
Charter School
16950 116th Ave Se
Renton, WA 98058
(206) 712-7640
Renton, WA 98058
(206) 712-7640
Grades: K-5
| 129 students
Rank: n/an/a
Impact Salish Sea Elementary School
Charter School
3438 S. 148th Street
Seattle, WA 98168
(206) 712-7640
Seattle, WA 98168
(206) 712-7640
Grades: K-5
| 307 students
King County Schools (Closed)
School
Location
Grades
Students
19-21 Transition Academy (Closed 2013)
Special Education School
16642 Cleveland St
Redmond, WA 98052
(425) 861-3452
Redmond, WA 98052
(425) 861-3452
Grades: 12
| n/a students
4424 South 188th Street, 700 B
Seattle, WA 98188
(206) 631-6500
Seattle, WA 98188
(206) 631-6500
Grades: 9-12
| 468 students
African American Academy K-8 (Closed 2010)
Alternative School
8311 Beacon Av S
Seattle, WA 98118
(206) 252-6650
Seattle, WA 98118
(206) 252-6650
Grades: K-8
| 353 students
Alternative Junior High School (Closed 2007)
Alternative School
18603 Bothell Wy Ne
Bothell, WA 98011
(425) 489-6244
Bothell, WA 98011
(425) 489-6244
Grades: 7-8
| 13 students
Ancillary (Closed 2013)
Special Education School
15675 Ambaum Blvd Sw
Seattle, WA 98166
(206) 433-2125
Seattle, WA 98166
(206) 433-2125
Grades: PK-12
| n/a students
830 Sw 116th St
Seattle, WA 98146
(206) 631-6250
Seattle, WA 98146
(206) 631-6250
Grades: 9-12
| 305 students
19300 108th Ave Se
Kent, WA 98031
(206) 931-0964
Kent, WA 98031
(206) 931-0964
Grades: K-8
| n/a students
5701 Kersey Way Se
Auburn, WA 98092
(253) 931-4715
Auburn, WA 98092
(253) 931-4715
Grades: 1-12
| 264 students
Best Night School (Closed 2013)
Alternative School
10903 Ne 53rd St
Kirkland, WA 98033
(425) 936-2300
Kirkland, WA 98033
(425) 936-2300
Grades: 9-12
| n/a students
Birth To 3 Contracts (Closed 2023)
Special Education School
2445 3rd Av S
Seattle, WA 98124
(206) 252-0809
Seattle, WA 98124
(206) 252-0809
Grades: PK
| n/a students
Boyer Clinic Elementary School (Closed 2013)
Special Education School
1850 Boyer Ave East
Seattle, WA 98112
(206) 252-0838
Seattle, WA 98112
(206) 252-0838
Grades: PK
| n/a students
The Bridge (Closed 2023)
Special Education School
2142 10 Av W
Seattle, WA 98119
(206) 252-0832
Seattle, WA 98119
(206) 252-0832
Grades: K-12
| 1 students
Bsd Vocational Edcareer Education Options High School (Closed 2015)
Alternative School
12111 Ne 1st Street
Bellevue, WA 98005
(425) 456-4108
Bellevue, WA 98005
(425) 456-4108
Grades: 9-12
| 34 students
Career Development Learning Cente (Closed 2004)
Alternative School
919 Sw Grady Way Ste 125
Renton, WA 98055
(206) 205-6510
Renton, WA 98055
(206) 205-6510
Grades: 9-12
| 42 students
Career Education Options High School (Closed 2009)
Alternative School
16101 Greenwood Avenue N.
Seattle, WA 98133
(206) 368-4118
Seattle, WA 98133
(206) 368-4118
Grades: 11
| 220 students
Career Link High School (Closed 2006)
Alternative School
2445 3 Av S
Seattle, WA 98134
(206) 252-0732
Seattle, WA 98134
(206) 252-0732
Grades: 9-12
| 185 students
Cascade Parent Partnership Program (Closed 2023)
Alternative School
2919 1st Avenue West
Seattle, WA 98119
(206) 706-4270
Seattle, WA 98119
(206) 706-4270
Grades: K-8
| 213 students
Childhaven (Closed 2023)
Alternative School
650 South Orcas Street
Seattle, WA 98108
(253) 945-2084
Seattle, WA 98108
(253) 945-2084
Grades: PK-12
| 3 students
Childhaven Elementary School (Closed 2013)
Special Education School
302 Broadway Av
Seattle, WA 98122
(206) 252-0838
Seattle, WA 98122
(206) 252-0838
Grades: PK-5
| n/a students
Children's Institute For Learning Differences (Closed 2023)
Special Education School
4030 86th Ave Se Suite F
Mercer Island, WA 98040
(253) 945-2084
Mercer Island, WA 98040
(253) 945-2084
Grades: PK-12
| 1 students
1901 Sw Genesee St
Seattle, WA 98106
(206) 252-8170
Seattle, WA 98106
(206) 252-8170
Grades: PK-5
| 266 students
Destiny Ale School (Closed 2023)
Alternative School
210 South Hudson Street
Seattle, WA 98134
(509) 258-4534
Seattle, WA 98134
(509) 258-4534
Grades: 6-8
| n/a students
29300 Ne 150th St
Duvall, WA 98019
(425) 844-4900
Duvall, WA 98019
(425) 844-4900
Grades: K-5
| 58 students
1900 N 170th St
Seattle, WA 98155
(206) 393-4250
Seattle, WA 98155
(206) 393-4250
Grades: PK
| 60 students
4255 153rd Avenue Se
Bellevue, WA 98006
(425) 456-5100
Bellevue, WA 98006
(425) 456-5100
Grades: PK-5
| 316 students
15675 Ambaum Blvd Sw
Seattle, WA 98166
(206) 433-2125
Seattle, WA 98166
(206) 433-2125
Grades: PK
| n/a students
Education Service Centers (Closed 2018)
Alternative School
1330 N 90 St
Seattle, WA 98108
(206) 252-4789
Seattle, WA 98108
(206) 252-4789
Grades: 6-12
| n/a students
Eeu Special Education Elementary School (Closed 2023)
Special Education School
4160 86th Ave Se
Mercer Island, WA 98040
(206) 236-3325
Mercer Island, WA 98040
(206) 236-3325
Grades: PK-4
| 4 students
Erac Special Education (Closed 2013)
Special Education School
15675 Ambaum Blvd Sw
Seattle, WA 98166
(206) 433-2125
Seattle, WA 98166
(206) 433-2125
Grades: PK-12
| n/a students
Evening School (Marshall) (Closed 2013)
Alternative School
4400 Interlake Ave North
Seattle, WA 98103
(206) 252-4680
Seattle, WA 98103
(206) 252-4680
Grades: 9-12
| n/a students
Excel Ale School (Closed 2023)
Alternative School
210 South Hudson St Ste 318
Seattle, WA 98134
(509) 258-4534
Seattle, WA 98134
(509) 258-4534
Grades: 6-7
| n/a students
Excel Charter School (Closed 2020)
Charter School
19300 108th Ave Se
Kent, WA 98031
(253) 487-7530
Kent, WA 98031
(253) 487-7530
Grades: 7-10
| 188 students
Experimental Education Unit Elementary School (Closed 2023)
Special Education School
1959 Ne Pacific St
Seattle, WA 98195
(206) 252-0806
Seattle, WA 98195
(206) 252-0806
Grades: PK-K
| 66 students
33330 8th Ave S
Federal Way, WA 98003
(253) 945-2000
Federal Way, WA 98003
(253) 945-2000
Grades: 11-12
| 3 students
First Place Scholars Charter School (Closed 2023)
Charter School
170 20th
Seattle, WA 98122
(206) 323-6715
Seattle, WA 98122
(206) 323-6715
Grades: K-5
| 106 students
Show 88 more closed public schools in King County, WA (out of 123 total schools)
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Frequently Asked Questions
What are the top ranked public charter schools in King County, WA?
The top ranked public charter schools in King County, WA include Impact Schools, Rainier Prep and Summit School Sierra. King County has one of the highest concentrations of top ranked public schools in Washington.
How many public charter schools are located in King County?
9 public charter schools are located in King County.
What is the racial composition of students in King County?
King County public charter schools minority enrollment is 83% of the student body (majority Black), which is more than the Washington public charter schools average of 66% (majority Black).
Which public charter schools in King County are often viewed compared to one another?
Popular comparisons of public charter schools in King County include: Impact Salish Sea Elementary School vs. Impact Schools, Summit School Olympus vs. Summit School Atlas, Impact Schools vs. Impact Salish Sea Elementary School
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