- This article refers to the Trill species. You may instead be looking for the planet Trill.
Trill are humanoid lifeforms native to their home world Trill. Trill are a playable race in Star Trek Online and belong to the Federation and Klingon Empire. The game mechanics treats Joined Trill, who carry a Trill symbiont, as a separate race.
 Physical features
The Trill are very similar to Humans except for their spots, which are mostly seen on the sides of their heads. These spots run from their heads down their shoulders and carry on down their torso and legs to the feet.
 Other information
The Trill race consists of both hosts and symbionts. The Trill symbiont is a creature which is implanted into a Trill host, and subsequently joins with it, but this "race" consists entirely of unjoined humanoid Trill.
- Species trait: Ground trait. Increased your health regeneration and provides innate resistance to radiation and toxic damage.
- +33 Radiation Damage resistance
- +33 Toxic Damage resistance
- +0.1 Health Regeneration