James Schwarzenbach (5 August 1911 – 27 October 1994) was a right-wing Swiss politician and publicist. In the 1970s he was head of the short-lived Republican Movement. He also was publisher of fascist, völkisch and antisemitic literature as the owner of Thomas-Verlag. He served in the National Council from December 12, 1967 to February 28, 1979, representing the Canton of Zürich.
Schwarzenbach was born in Rüschlikon to a Protestant industrialist family and went on to develop publishing industries. He converted to Roman Catholicism while at university, in 1933.
In 1934, as a student, Schwarzenbach orchestrated a public uproar by his fellow members of the pro-nazi movement National Front when the anti-fascist cabaret group "Die Pfeffermühle", in exile from Germany, was touring in Switzerland. In Zürich the cabaret, led by Therese Giehse, Erika Mann and Klaus Mann, was only able to perform under police protection. James Schwarzenbach's aunt Renée Schwarzenbach-Wille was suspected to be the power behind the turmoil. She accused Erika Mann to have set up her daughter, the writer Annemarie Schwarzenbach who was a close friend of the Mann family, against her own family.
In 1939, at the age of 28, Schwarzenbach earned his doctorate in history at the University of Zurich. The subject of his thesis was the neutrality policy of Switzerland.