MacDowell Montessori School is a public school that is part of the Milwaukee Public School District. Located at 6415 W Mt Vernon Ave it is on the west side of Milwaukee, Wisconsin in the Bluemound Heights neighborhood. The school building was built in 1932 as the home for Solomon Juneau Business High School which closed down in 2006.

The school began in late August 2009 as Montessori International Baccalaureate High School then during 2012–2013, they merged with Edward A. MacDowell Montessori School to now serve as a K3-12 school with an International Baccalaureate curriculum for grades 11–12, while using Montessori education for K3-12.