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+ nl:M105