'''TMCA''' may refer to:
* Tauro-muricholic acid, a type of bile acid * The Medical Center of Aurora, in Aurora, Colorado * Total Museum of Contemporary Art, in Seoul, South Korea * Toyota Motor Corporation Australia, a subsidiary of Toyota Motor Corporation * TRNAMet cytidine acetyltransferase (TmcA), an enzyme * Tsing Ma Control Area, a subdivision of Hong Kong
{{disambiguation}}