Delta Omicron International Music Fraternity is a professional fraternity in the field of music with collegiate chapters established throughout the United States and abroad.

The fraternity was founded in 1909 at the Cincinnati Conservatory of Music by three undergraduate students. The Founders were Hazel Wilson, Lorena Creamer, and Mable Dunn.

Delta Omicron is the only organization of its kind founded by students for students. From 1909 to the present, twenty-six Delta Omicron national presidents have guided the fraternity to achieve and fulfill its purposes and objectives.