Bypass may refer to:
- Bypass (audio), in effects units, a switch that allows sound
- Bypass (computing), in computing, circumventing security features in hacking, or taking a different approach to an issue in troubleshooting
- Bypass (road)
- Bypass surgery
- Bypass (telecommunications)
- Bypass (valve)
- Bypass capacitor, used to bypass a power supply or other high impedance component
- High bypass, a turbofan aircraft gas turbine engine
- Bypass duct
- Bypass ratio
- Bleach bypass, an optical effect
- Bypass switch