I currently have a friend obtaining a Master's level degree in music management from the University of Cincinnati. She has found her experience to be challenging and worthwhile. Having a BA in Music myself, I have heard many good things about Cincinnati's music program, especially their program in music management.
Some from different U. S. regions are: Ferris State University in Minnesota, Berklee College of Music in Massachusetts, Georgia State University School of Music, California State University in Sacramento.
There are many to choose from such as, Berklee College of Music in Boston, MA, New York University in New York, NY, University of Southern California in Los Angeles, CA and Ohio Northern University in Ada, OH.