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- Cary-Hiroyuki Tagawa
- Patricia Tallman
- Nick Tate
- Mark L. Taylor
- Eduardo Tejedo (Latin American dub: voice of Riker)
- Ricardo Tejedo (Latin American dub: voice of Jean-Luc Picard)
- Brian Thompson
- Susanna Thompson
- Ken Thorley
- Linda Thorson
- Malachi Throne
- Lawrence Tierney
- Brian Tochi
- Hallie Todd
- Tony Todd
Read more about this topic: List Of Star Trek: The Next Generation Cast Members