TRL or trl may refer to:
Arts Temporary Residence Limited, a record label Total Request Live, a former MTV show TRL Awards (Total Request Live), an Italian music award
Libraries Timberland Regional Library, a public library system in the U.S. state of Washington Toronto Reference Library, the largest public reference library in Canada
Science and technology Technology readiness level Telstra Research Laboratories, Australia Thru-Reflect-Line, a technique used for network analyzer (electrical) calibration Resistor–transistor logic, a class of digital circuits Transport Research Laboratory, UK
Sports Tariff Reform League, UK Toowoomba Rugby League, Australian rugby league football competition
Transportation Terrell Municipal Airport, Texas, US, IATA airport code TRL Thirroul railway station, New South Wales, Australia, station code TRL Tiruvallur railway station, Tamil Nadu, India, station code TRL
Other uses The Rockin' Life, Indonesian radio network Turkish lira, ISO 4217 code before redenomination in 2005 trl, the ISO 639-3 code for Scottish Cant, Scotland