Mercer Island has 2 verified Montessori schools plus 2 Montessori-friendly family resources. We ranked every school by Google rating and review volume using a Bayesian average, so consistently well-reviewed schools rise to the top. Each school is verified as an authentic Montessori program. Updated July 2026.
2
Verified schools
5.0 ⭐
Avg rating
4
All listings
July 2026
Updated
LooffAn Montessori （Mercer island） is a Montessori school located in Mercer Island, Washington.
View LooffAn Montessori （Mercer island） full profile →Early World Montessori is a Montessori school located in Mercer Island, Washington.
View Early World Montessori full profile →Ranking methodology: schools are ordered by a Bayesian average — score = (v·R + 10·C) / (v + 10), where R is the school's Google rating, v its review count, and C = 4.7 the review-weighted average rating of all verified Montessori schools on MontessoriCity. This prevents a school with one 5-star review from outranking consistently well-reviewed schools. Only schools verified as authentic Montessori programs are ranked.