Mars Princess, Martian Princess, or Princess of Mars may refer to:
- A Princess of Mars, a 1912 novel by Edgar Rice Burroughs, part of the Barsoom series
- Aelita (novel), a 1923 novel by Aleksey Tolstoy, featuring the title character as the princess of Mars
- Aelita, a 1924 Soviet film based on the novel, featuring the title character as the queen of Mars
- Sailor Mars, also known as Princess Mars, a character in the manga series Sailor Moon