Maximilian Harden (born Felix Ernst Witkowski, he changed his name to Maximilian Harden) (20 October 1861 – 30 October 1927) was an influential German journalist and editor.
Born the son of a Jewish merchant in Berlin he attended the Französisches Gymnasium until he began to train as an actor and joined a traveling theatre troupe. In 1878 Harden converted to Protestantism and started his journalistic career as a theatre critic in 1884. He also published political essays under the pseudonym Apostata in several liberal newspapers like the Berliner Tageblatt edited by Rudolf Mosse.
From 1892 Harden published the journal Die Zukunft (The Future) in Berlin. His baroque style was mocked by former friend Karl Kraus, who wrote a satire about "translations from Harden".
Initially a monarchist, Harden became a fierce critic of Kaiser Wilhelm II and his entourage around Prince Philip of Eulenburg and General Kuno von Moltke. His public accusations of homosexual behaviour – according to Paragraph 175 a criminal offence at that time – from 1906 on led to numerous trials and did sustained damage to the reputation of the ruling House of Hohenzollern and the German jurisdiction. In reaction Karl Kraus, disgusted by the public display of intimate details, wrote an obituary: Maximilian Harden. Eine Erledigung (A Settlement).
By 1914, Harden had again moved sufficiently to the right that he welcomed the German invasion of Belgium. During the war, Harden was an annexationist who wrote numerous articles demanding that Germany win the war to annex most of Europe, Africa and Asia to make the Reich the world's greatest power. However, after the war he became a pacifist and supported the Weimar Republic.