Horst Janssen (14 November 1929 – 31 August 1995) was a German draftsman, printmaker, poster artist and illustrator. He had a prolific output of drawings, etchings, woodcuts, lithographs and wood engravings. The Horst Janssen Museum in his hometown of Oldenburg is dedicated to his legacy. His work is shown internationally in major museums. His life was marked by numerous marriages, outspoken opinions, alcoholism, and selfless dedication to the art of printmaking.