BTD (disambiguation)
BTD may refer to:
- Back to December, a song by the American singer-songwriter Taylor Swift from her third studio album Speak Now
- BTD (Before the Dawn)
- Bloons Tower Defense, the tower defense series by Ninja Kiwi
- Biotinidase, the enzyme in humans that is encoded by the BTD gene
- British trade dollar, a silver coin minted by Great Britain to facilitate trade with the Far East
- Douglas BTD Destroyer, the 1940s American torpedo/dive-bomber
- Built to Destroy (Michael Schenker Group album), the fourth album by the Michael Schenker Group
- Built to Destroy (Incite album), the fifth album by Incite