Fritz Brupbacher was a Swiss medical doctor, libertarian socialist and writer.

Fritz Erpenbeck was a German writer, director and actor.

Fritz Fischer was a German historian best known for his analysis of the causes of World War I. In the early 1960s Fischer advanced the controversial thesis at the time that responsibility for the outbreak of the war rested solely on Imperial Germany. Fischer's anti-revisionist claims shocked the West German government and historical establishment, as it made Germany guilty for both world wars, challenging the national belief in Germany's innocence and converting its recent history into one of conquest and aggression.

Fritz Hartung was a political and constitutional historian of Germany.

Fritz Hommel was a German Orientalist.

Fritz Joachim Raddatz was a German feuilletonist, essayist, biographer, journalist and romancier.

Fritz Reuter Leiber Jr. was an American writer of fantasy, horror, and science fiction. He was also a poet, actor in theater and films, playwright, and chess expert. With writers such as Robert E. Howard and Michael Moorcock, Leiber is one of the fathers of sword and sorcery and coined the term.

Fritz Löhner-Beda, born Bedřich Löwy, was an Austrian librettist, lyricist and writer. Once nearly forgotten, many of his songs and tunes remain popular today. He was murdered in Auschwitz III Monowitz concentration camp.

Fritz Machlup was an Austrian-American economist who was president of the International Economic Association from 1971 to 1974. He was one of the first economists to examine knowledge as an economic resource, and is credited with popularizing the concept of the information society.

Fritz Mauthner was an Austrian philosopher and author of novels, satires, reviews and journalistic works. He was an exponent of philosophical scepticism derived from a critique of human knowledge and of philosophy of language.