TRR

TRR may refer to:


 * Society for Family Development (Towarzystwo Rozwoju Rodziny), a Polish organization
 * Target row refresh, a computer hardware feature used to prevent the row hammer effect in DDR4 memory
 * Taushiro language (ISO 639:trr), a language isolate of the Peruvian Amazon
 * Tehran Research Reactor, an Iranian nuclear research reactor, supplied by the U.S. in 1960
 * Thai Roong Ruang, a sugar producer
 * Three Rivers Review, a literary magazine published by the University of Pittsburgh
 * Tom Rhodes Radio, an interview podcast
 * TRR is the station code for Torre railway station in Devon, England
 * Trottoir roulant rapide, a moving walkway in the Montparnasse–Bienvenüe Metro station, France
 * Trusted Recursive Resolver, a DNS-resolving server operated by Mozilla for using DNS over HTTPS in the Firefox web browser
 * Tuckerton Railroad (reporting mark TRR), a former railroad that operated in New Jersey, United States
 * Tulsa Rig, Reel, and Manufacturing Company, a predecessor company of Flintco
 * China Bay Airport (IATA: TRR), near Trincomalee, Sri Lanka