The Teplan system was a star system located in the Gamma Quadrant, between the Jenkata Nebula and the Kendi system. It held a single star, a blue-white A-class star with a brightness of magnitude +3 (ST reference: Star Charts).
The system held the homeworld of the Teplan race (DS9 episode: "The Quickening"; Decipher RPG module: Through a Glass, Darkly).
In 2376, the crew of the Even Odds discovered folk art from the Teplan system from a time before the Teplans were infected with the blight (DS9 novel: Rising Son).