Racer X may refer to:
- Racer X (band), a Los Angeles-based heavy metal band.
- Racer X (Speed Racer character), a character from the 1960s Japanese anime Speed Racer.
- Racer-X, a 1984 EP by Big Black.
- Racer X (article), a 1998 Vibe article by Ken Li and basis for the Fast & Furious film series.