TRO
TRO or tro may refer to:
Music
- Tro (instrument), Cambodian string instrument
 - "Tro" (song), 1996, Marie Fredriksson
 - The Richmond Organization, Inc., American music publisher
 
Other uses
- TRO (gene) or trophinin, a human protein involved in cell adhesion
 - TRO (company), American architects
 - Televisión Regional del Oriente, Colombian television network
 - Tamils Rehabilitation Organisation
 - Temporary restraining order, in American law
 - Taree Airport, New South Wales, Australia (IATA code: TRO)
 - Traffic Regulation Order, in the law of England and Wales