Flint has it.  And it's free.

Montessori is a learning method that can be used throughout early childhood, elementary and secondary school.  Families in Flint, MI now have access to a free, public choice to for Montessori education in pre-kindergarten and elementary school through the Flint Community Schools Montessori program at Durant Tuuri Mott. 

Whether your family already knows and loves Montessori education or whether you are curious about an option for school that offers hands-on learning, and freedom of choice (within limits), this is a resource for you to learn more about Montessori education in Flint.
Apply Now to Flint's Montessori Elementary Program 
The 2018-19 Elementary Montessori program is application-based.  (Current Flint Montessori Elementary students do not need to re-apply.)  The application is available for download now and hard copies are available at the Office of Centralized Enrollment (923 E. Kearsley St.)