TMB may refer to:
Organizations Tamilnad Mercantile Bank Limited, India Texas Medical Board Thai Military Bank Transports Metropolitans de Barcelona, Spain
Places Kendall-Tamiami Executive Airport near Miami, Florida, US, IATA code Tsing Ma Bridge, a longest span suspension bridge in Hong Kong Two-Mile Borris, a village in County Tipperary, Ireland
Events Tour du Mont Blanc, a walk
Science and technology Trimethylborane Tumor mutational burden 3,3',5,5'-Tetramethylbenzidine, a chemical stain. TMB and TMSB series mines (Soviet) TMB (German mine)
Arts The Spirit of Troy, the University of Southern California Trojan Marching Band The Midnight Beast, a British comedy music group Other uses The Third Millennium Bible, a minor update to the King James Version