TRO or tro may refer to:

Music[edit]

• Tro (instrument), Cambodian string instrument
• "Tro" (song), 1996, Marie Fredriksson
• The Richmond Organization, Inc., American music publisher

Other uses[edit]

• 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