TDG may refer to:
- TDG Limited, (ex-Transport Development Group) a British logistics and distribution company, now part of Norbert Dentressangle
- Traffic Design Group, a New Zealand transport consultancy
- TransDigm Group's NYSE ticker symbol
- The Depreciation Guild, an indie rock band influenced by video game music
- Three Days Grace, a Canadian rock band
- Thymine-DNA glycosylase, an enzyme
|This disambiguation page lists articles associated with the title TDG.
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