TCMC may refer to:
The Commonwealth Medical College, former name of Geisinger Commonwealth School of Medicine Tri-City Medical Center, a hospital in Oceanside, California TCMC, alternative abbreviation for the chemical DOTAM The Twin Cities–Milwaukee–Chicago project, the name used during planning for the Borealis (train) Thomson Components – Mostek Corporation (onetime subsidiary of Thomson Semiconducteurs, the semiconductor arm of France’s Thomson-CSF Tambaram City Municipal Corporation, Tambaram, Tamil Nadu, India