The Montessori School of Duluth started as the Montessori Elementary School -- the first private, independent, nondenominational elementary school in the history of Duluth. It was founded in 1981 by Anne and Al Nephew to serve fifteen students graduating from a Montessori Children's House. The elementary classroom, originally located on Park Point, was taught by Anne who earned her AMI elementary diploma in Dublin, Ireland, her teaching license from St. Scholastica College, and her MA from the University of Minnesota.

The school was incorporated as the Montessori School of Duluth, Inc., a not-for-profit tax exempt corporation, in 1982. In 1983 it added the preschool Montessori program and moved to the Cathedral (now Marshall) High School campus.

In 1991, after renting at Cathedral for eight years, Montessori School of Duluth purchased property in Hunter's Park, a beautiful, quiet residential neighborhood in eastern Duluth convenient to the colleges and seven minutes from downtown. In 2009 and 2011, enlargement and remodeling projects were completed in the Early and Late Care area and the Elementary areas, creating an exceptional planned environment for the school's students. The remodeled building provides generous space for the school's growing enrollment.

2014 is a year of internal change at Montessori School of Duluth. After a lifetime of exceptional service to the children of Duluth, founder Anne Nephew retired as Head of School in the spring and welcomed Joel Young to take up those reins of leadership, along with his wife Lindsey Young as Director of Administration. The school's future promises great things under their direction!