- DTMA stands for Duplex Tower Mounted Amplifier (hardware)
- DTMA stands for Drought Tolerant Maize for Africa (est. 2006)
- DTMA stands for Derry Township Municipal Authority (Hershey, PA, USA)
- DTMA stands for Defence Transport and Movements Agency (UK)
- DTMA stands for Dépannage Télévision Magnétoscope Ardennais (French television repair company)
- DTMA stands for Dayton Tooling & Manufacturing Association (Dayton, OH)
- DTMA stands for Detriazinyl Metabolite of Almitrine
DTMA