Louis Marschalko, also known as Lajos Marschalko (11 September 1903 – 20 May 1968), was a Hungarian nationalist writer. Born in Betschermen, Austria-Hungary, Marschalko’s father was a secondary school teacher and his mother was a musician. He began his career writing for nationalistic newspapers and lived in Debrecen until 1936 before moving to Budapest. He authored the booklet “Who Betrayed Hungary in 1918-19,” which was banned after 1945 for its anti-Jewish and antisemitic content.

After World War II, Marschalko did not return to Hungary, fearing execution by the Bolsheviks. He stayed in Munich and attempted to emigrate to the USA, but his application was denied due to alleged Jewish influence. He then returned to Munich, where he worked during the day and wrote at night.

Marschalko’s writings often focused on the role of Jews in Hungary and globally, attributing significant political and social upheaval to Jewish influence.