M105

M105 or M-105 may refer to:


 * Messier 105, an elliptical galaxy in the constellation Leo
 * M105, a 1½ ton US Army trailer
 * M-105 (Michigan highway), a former state highway in Michigan
 * Klimov M-105 aircraft engine
 * WWWM, a radio station in Cleveland, Ohio now known as WMJI

In athletics:
 * Masters athletics, an age group for athletes aged 35+

M105