The average private school in Washington was founded around 1977 (2025).
The oldest private school in Washington is Assumption School, founded in 1864.
Year Founded Range: 1864
1908
Avg. Year Founded: 1896
Oldest Private Schools in Washington (2025)
School
Founding Date
Grades
Location
Rank: #1 - 21. - 2.
Assumption School
(Catholic)
Founding Date: 1864
Grades: PK-8
2066 E Alder St
Walla Walla, WA 99362
(509) 525-3030
Walla Walla, WA 99362
(509) 525-3030
Rank: #1 - 21. - 2.
Desales Catholic High School
(Catholic)
Founding Date: 1864
Grades: 9-12
919 E Sumach St
Walla Walla, WA 99362
(509) 525-3030
Walla Walla, WA 99362
(509) 525-3030
Rank: #33.
St. Joseph Marquette Catholic School
(Catholic)
Founding Date: 1875
Grades: PK-8
202 N 4th St
Yakima, WA 98901
(509) 575-5557
Yakima, WA 98901
(509) 575-5557
Rank: #44.
Founding Date: 1880
Grades: 9-12
728 21st Ave E
Seattle, WA 98112
(206) 323-4272
Seattle, WA 98112
(206) 323-4272
Rank: #55.
Founding Date: 1883
Grades: NS-PK
38809 Ne 41st Ave
La Center, WA 98629
(360) 263-2303
La Center, WA 98629
(360) 263-2303
Rank: #66.
Founding Date: 1884
Grades: NS-12
827 N Tacoma Ave
Tacoma, WA 98403
(253) 272-2216
Tacoma, WA 98403
(253) 272-2216
Rank: #77.
Walla Walla Valley Academy
(Seventh Day Adventist)
Founding Date: 1886
Grades: 9-12
300 Sw Academy Way
College Place, WA 99324
(509) 525-1050
College Place, WA 99324
(509) 525-1050
Rank: #88.
Founding Date: 1887
Grades: 9-12
1224 E Euclid Ave
Spokane, WA 99207
(509) 483-8511
Spokane, WA 99207
(509) 483-8511
Rank: #9 - 119. - 11.
Derech Emunah
All-girls (Jewish)
Founding Date: 1891
Grades: 9-12
5145 S Morgan Street Seattle
Seattle, WA 98118
(206) 402-6621
Seattle, WA 98118
(206) 402-6621
Rank: #9 - 119. - 11.
Martha & Mary Primary School
Daycare / Preschool (Evangelical Lutheran Church in America (formerly AELC, ALC, or LCA))
Founding Date: 1891
Grades: NS-K
19160 Front St. NE
Poulsbo, WA 98370
(360) 779-7500
Poulsbo, WA 98370
(360) 779-7500
Rank: #9 - 119. - 11.
Seattle Preparatory School
(Catholic)
Founding Date: 1891
Grades: 9-12
2400 11th Ave E
Seattle, WA 98102
(206) 324-0400
Seattle, WA 98102
(206) 324-0400
Rank: #1212.
Rogers Adventist School![Rogers Adventist School Photo - Rogers Adventist School]( "Rogers Adventist School Photo - Rogers Adventist School")
(Seventh Day Adventist)
Founding Date: 1892
Grades: K-12
200 SW Academy Way
College Place, WA 99324
(509) 529-1850
College Place, WA 99324
(509) 529-1850
Rank: #13 - 1413. - 14.
Guardian Angel-st Boniface School
(Catholic)
Founding Date: 1893
Grades: K-6
306 Steptoe
Colton, WA 99113
(509) 229-3579
Colton, WA 99113
(509) 229-3579
Rank: #13 - 1413. - 14.
Founding Date: 1893
Grades: NS-8
1112 North G Street
Tacoma, WA 98403
(253) 274-4134
Tacoma, WA 98403
(253) 274-4134
Rank: #1515.
Parkland Lutheran Church & School![Parkland Lutheran Church & School Photo]( "Parkland Lutheran Church & School Photo")
(Wisconsin Evangelical Lutheran Synod)
Founding Date: 1894
Grades: PK-8
120 123rd Street South
Tacoma, WA 98444
(253) 537-1901
Tacoma, WA 98444
(253) 537-1901
Rank: #1616.
Founding Date: 1897
Grades: K-12
202 E 56th Street
Tacoma, WA 98404
(253) 475-9513
Tacoma, WA 98404
(253) 475-9513
Rank: #1717.
Meadow Glade Adventist Elementary School
(Seventh Day Adventist)
Founding Date: 1899
Grades: K-8
18717 Ne 109th Ave
Battle Ground, WA 98604
(360) 687-5121
Battle Ground, WA 98604
(360) 687-5121
Rank: #1818.
Founding Date: 1901
Grades: K-8
3923 103rd Ave SE
Lake Stevens, WA 98258
(425) 334-5064
Lake Stevens, WA 98258
(425) 334-5064
Rank: #19 - 2019. - 20.
Columbia Adventist Academy
(Seventh Day Adventist)
Founding Date: 1903
Grades: 9-12
11100 Ne 189th St
Battle Ground, WA 98604
(360) 687-3161
Battle Ground, WA 98604
(360) 687-3161
Rank: #19 - 2019. - 20.
Yakima Adventist Christian School![Yakima Adventist Christian School Photo]( "Yakima Adventist Christian School Photo")
(Seventh Day Adventist)
Founding Date: 1903
Grades: PK-10
1200 City Reservoir Rd
Yakima, WA 98908
(509) 966-1933
Yakima, WA 98908
(509) 966-1933
Rank: #21 - 2921. - 29.
Founding Date: 1905
Grades: PK-12
600 N Western Ave
Wenatchee, WA 98801
(509) 662-2723
Wenatchee, WA 98801
(509) 662-2723
Rank: #21 - 2921. - 29.
Family House Academy
Alternative School
Founding Date: 1905
Grades: K-8
1220 Carroll Rd
Kelso, WA 98626
(360) 425-7481
Kelso, WA 98626
(360) 425-7481
Rank: #21 - 2921. - 29.
Mason County Christian School
(Baptist)
Founding Date: 1905
Grades: K-10
470 E Eagle Ridge Dr
Shelton, WA 98584
(360) 426-7616
Shelton, WA 98584
(360) 426-7616
Rank: #21 - 2921. - 29.
Montessori School Of Yakima
Montessori School
Founding Date: 1905
Grades: PK-6
511 N 44th Ave
Yakima, WA 98908
(509) 966-0680
Yakima, WA 98908
(509) 966-0680
Rank: #21 - 2921. - 29.
Mukilteo Montessori School
Montessori School
Founding Date: 1905
Grades: PK-K
13318 Beverly Park Road - Edmonds Road
Mukilteo, WA 98275
(425) 743-4667
Mukilteo, WA 98275
(425) 743-4667
Rank: #21 - 2921. - 29.
Founding Date: 1905
Grades: PK-8
3816 College St Se
Lacey, WA 98503
(360) 878-8915
Lacey, WA 98503
(360) 878-8915
Rank: #21 - 2921. - 29.
Redemption Evangelical Lutheran
(Other Lutheran)
Founding Date: 1905
Grades: 1-5
20120 24th Ave W
Lynnwood, WA 98036
(425) 775-2145
Lynnwood, WA 98036
(425) 775-2145
Rank: #21 - 2921. - 29.
Founding Date: 1905
Grades: K-6
11208 Ne Hazel Dell Ave
Vancouver, WA 98685
(360) 574-5307
Vancouver, WA 98685
(360) 574-5307
Rank: #21 - 2921. - 29.
Valley Montessori School
Montessori School
Founding Date: 1905
Grades: K
14711 E Broadway Ave
Spokane, WA 99216
(509) 924-6629
Spokane, WA 99216
(509) 924-6629
Rank: #30 - 3130. - 31.
Founding Date: 1906
Grades: PK-8
7040 36th Ave Ne
Seattle, WA 98115
(206) 525-7407
Seattle, WA 98115
(206) 525-7407
Rank: #30 - 3130. - 31.
Montessori For Kids
Montessori School
Founding Date: 1906
Grades: PK-K
14410 Greenwood Ave N
Seattle, WA 98133
(206) 361-2264
Seattle, WA 98133
(206) 361-2264
Rank: #32 - 3432. - 34.
Founding Date: 1907
Grades: 5-12
4800 139th Avenue SE
Bellevue, WA 98006
(425) 641-0700
Bellevue, WA 98006
(425) 641-0700
Rank: #32 - 3432. - 34.
Founding Date: 1907
Grades: PK-8
5816 15th Ave NW
Seattle, WA 98107
(206) 782-4363
Seattle, WA 98107
(206) 782-4363
Rank: #32 - 3432. - 34.
St. Joseph School![St. Joseph School Photo - St. Joseph School]( "St. Joseph School Photo - St. Joseph School")
(Catholic)
Founding Date: 1907
Grades: K-8
700 18th Ave E
Seattle, WA 98112
(206) 329-3260
Seattle, WA 98112
(206) 329-3260
Rank: #3535.
St. Benedict School
(Catholic)
Founding Date: 1908
Grades: K-8
4811 Wallingford Ave N
Seattle, WA 98103
(206) 633-3375
Seattle, WA 98103
(206) 633-3375
Show 100 more private schools in WA (out of 589 total schools)
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Frequently Asked Questions
What is the Washington average private schools founding year?
The Washington average private schools founding year is 1977 for 2025.
What are the private schools with oldest founding year in Washington?
The top ranked private schools in Washington include Assumption School, Desales Catholic High School and St. Joseph Marquette Catholic School.
What is private high school and private elementary school with the oldest founding year in Washington?
The private high school with the oldest founding year in Washington is Desales Catholic High School, with a year of 1864. The private elementary school with the oldest founding year is Assumption School, with a year of 1864.
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