Marathon may refer to:
- The Marathon franchise, the overarching property spanning multiple games.
- Marathon Trilogy, the original series of the Marathon franchise.
- Marathon, the first game of the Marathon Trilogy, released in 1994.
- Marathon, the mid-2020's extraction shooter revival of the same name.
- Marathon ARG, the alternate reality game surrounding the relaunch.
- Marathon Trilogy, the original series of the Marathon franchise.
- UESC Marathon, the ship that Marathon (1994) was set on.
- Project Marathon, the initiative by the UESC to settle Tau Ceti.
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