Christian Carl Magnussen (31 August 1821, Bredstedt – 18 July 1896, Schleswig) was a German painter, primarily of genre scenes.
He began his artistic career as a student of Herman Wilhelm Bissen at the Royal Danish Academy of Fine Arts in Copenhagen.
There, he made the acquaintance of Georg Christian Lorenz Meyer, a local politician, and fell in love with his daughter, Meta.
When relations between Austria and Italy became strained and war appeared imminent, he took his family back to Germany and settled in Hamburg, where he once again became a portrait painter.
In 1894, when his school had proven to be financially unsuccessful, he placed his collection in the new Museum of Applied Arts in Copenhagen, as an exhibition for sale.