- Novels:
- The Prisoner (1929)
- The Adventures of Hajji Baba of Ispahan (1933)
- The Riddle of the Sands: A Record of Secret Service in the North Sea (1898)
- The Nine Tomorrows (1939)
- The Blue Trout (1941)
- The Legend of the Seven Sleepers (1947)
- Short stories:
- The Red Carpet: 17 Short Stories (1924)
- The Black Bag: More Stories (1928)
- The Happy Husband (1931)
- The Man Who Made Wine (1933)
- The Pavilion of Laughter (1940)
- The Enchanted Valley: 15 Short Stories (1947)
- Plays:
- The Green Goddess (1921)
- The Man Who Laughs (1925)
- Madame Sans-Gêne: A Comic Opera (1926)
- The Royal Prisoner: A Romantic Play in Three Acts (1928)
- The Man at the Crossroads (1931)
- The House of Bernarda Alba (1936)
- Screenplays:
- The Prisoner of Zenda (1937)
- The Adventures of Hajji Baba of Ispahan (1954)
- The Royal Prisoner (1936)
- The Man in the Iron Mask (1939)
- The Devil and Daniel Webster (1941)
- The Scarlet Pimpernel (1934)
Oskar von Wertheimer's body of work is marked by his wit, intelligence, and keen observations on human nature. He was a master of storytelling and his writings have been enjoyed by generations of readers.