PMU may refer to:
- Periyar Maniammai University
- Pomeranian Medical University
- Presbyterian Missionary Union
- Prince Mohammad bin Fahd University
- Police MRT Unit of the Singapore Police Force
- Pregnant mare urine
- Progressive Muslim Union
- Power Management Unit, an integrated circuit on some computers that controls sleeping, waking from sleep, hard drive spin down, and other power-related features
- Phasor measurement unit, a device which measures phasors of AC quantities (voltage, current) in sync with a common time source (usually using a GPS radio clock)
- Pari mutuel urbain, the French state-controlled betting system. It sponsors the green jersey in the Tour de France