Mario Appelius (Arezzo, 29 July 1892 – Rome, 27 December 1946) was an Italian journalist and radio presenter, best known for being one of the most prominent Fascist propagandists during World War II.

He thus started his writing career, publishing describing the cities, peoples and countries that he visited across the five continents during the 1920s and 1930s.

In 1930 he founded the Italian language newspaper Il Mattino d'Italia in Buenos Aires, which he directed until 1933.

During the Second World War he was a radio commentator, becoming famous for his catchphrase "God damn the English!"

Despite the popularity of his radio broadcasts, his refusal to deny the difficulties encountered by the Italian-German armed forces and his increasingly pessimistic tones eventually made him disliked by the Ministry of Popular Culture and by Mussolini himself, resulting in his dismissal on 20 February 1943.