Lakeside School (Seattle)

Lakeside School
(Middle School) 13510 1st Avenue Northeast
(High School) 14050 1st Avenue Northeast

,
98125

United States
Information
Type
MottoTibi seris, tibi metis
(As you sow, so shall you reap)
Founded1919
FounderFrank G. Moran
LocaleUrban
Head of SchoolRyan Boccuzzi (interim)
Faculty111
Grades5–12
Enrollment876
Student to teacher ratio9:1
ColorsMaroon & Gold    
Athletics conference3A Metro League (WIAA)
MascotLeo the Lion
RivalO'Dea High School, Seattle Preparatory School and The Downtown School
NewspaperTatler
YearbookNumidian
Endowment$260 million
Annual tuition$44,730
Religious AffiliationNone
Websitewww.lakesideschool.org

Lakeside School (abbreviated as Lakeside or LS) is an independent, co-educational day school located in Seattle, Washington. It enrolls approximately 900 students in grades 5 through 12, and is divided into a Middle School (grades 5-8) and an Upper School (grades 9-12).

Founded in 1919, Lakeside has one of the largest endowments among independent schools in the United States, reaching $260 million as of March 2024. It launched one of the earliest continuously operating free summer educational programs in 1965 called the Lakeside Educational Enrichment Program (LEEP), designed to promote diversity by enrolling its first Black students of color. Lakeside offers need-based financial aid to students with family incomes under $250,000. Its list of alumni includes Microsoft co-founders Bill Gates and Paul Allen, Greenpeace USA executive director Annie Leonard, American actor Adam West, Major League Baseball athlete Corbin Carroll, and former Washington governor Booth Gardner.