Karl Markus Michel (4 September 1929 in Hong Kong – 16 November 2000 in Berlin) was a German writer.
After his marriage to Eva Moldenhauer, Michel went to the Hessischer Rundfunk in 1958 where he worked as a Radio drama editor until 1961.
Next to Hans Magnus Enzensberger, he was one of the founders of the leftist theory periodical Kursbuch as whose co-editor he cemented from 1971.
He left from Suhrkamp Verlag and founded with Axel Rütters the Autoren- und Verlagsgesellschaft Syndikat which lasted until 1986.
From 1980, he belonged to the Munich-based editors of the von Enzensberger founded Magazine TransAtlantik.