Eton School is a Montessori PK-8 in Bellevue, founded in 1977 and accredited by both the American Montessori Society and the Northwest Association of Independent Schools. It is the largest secular Montessori school on the Eastside and one of the few in Washington that runs a full Montessori sequence through middle school rather than ending at the typical K-3 or K-6 transition.
In the Eastside private K-8 market, Eton's peer set is layered: among Montessori schools the closest comparisons are Soundview and Woodinville Montessori; among broader secular K-8 alternatives, families weigh Eton against The Bear Creek School (Christian K-12), Open Window (gifted K-8 in Bellevue), French American School of Puget Sound (immersion K-8 in Mercer Island), and the elementary divisions of Overlake and Eastside Prep that start at 5th grade. The differentiator is pedagogy — multi-grade Montessori classrooms through Grade 3, with the Upper Elementary and Middle School phases transitioning to single-grade structure while preserving Montessori principles.
Enrollment is around 318 students with a 11:1 student-teacher ratio and tuition around $35,000, placing it firmly in the secular-independent price tier rather than the Christian-school or parish-school tiers. Spanish runs K-8. Graduates typically continue into Overlake, Eastside Prep, Lakeside, or Bellevue / Lake Washington public high schools.
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