Isolator may refer to:

• Isolator (EP), a 2006 EP by Two Hours Traffic
• The Isolator (helmet), a sensory protection device
• The Isolator, a 2015 Japanese light novel

• Isolator (microwave), a two-port device that transmits microwave power in one direction only
• Isolator switch, used in electrical circuits
• Barrier isolator, a device that provides a physical barrier between a laboratory technician and a work process
• Optical isolator, a directional device in optical fiber communications
• Opto-isolator, a directional device in electronics
• Vibration isolator, any of various devices to isolate connected parts of an assembly from each other's vibrations
  • Bushing (isolator), one type of vibration isolator

• Isolation (disambiguation)
• Insulator (disambiguation)