DTG may refer to:
- DTG (rapper), or DejiTheGamer, British rapper featured in S1mba song "Rover"
- DTG, or Lil Windex, Canadian rapper
- Date-time group, a set of characters used to express date and time
- Deutsche Treuhand-Gesellschaft, a German accounting firm that in 1979 merged with Klynveld Kraayenhof & Co.
- Diesel Traction Group, a railway preservation group in New Zealand
- Differential thermogravimetry, a differential thermal analysis technique
- Digital TV Group, UK members' association for digital television
- Direct to garment printing, a process of printing on textiles and garments
- Dolutegravir, an antiretroviral drug used to treat HIV/AIDS
- Dovetail Games, a British video game developer and publisher
- Dynamic theory of gravity, a unified field theory developed by Nikola Tesla
- The IATA Airport code for Dwight Airport