Founded in 1951 and located on the Eastside of Seattle in Medina, Washington, St. Thomas School (STS) is a private, co-ed, non-sectarian independent school serving 354 students from preschool through 8th grade. STS is one of Puget Sound's most established independent schools and features a highly regarded preschool, elementary, and middle school curriculum that prepares students to excel at future endeavors while honoring the school’s long-standing core values.