Jonas Quinn is a fictional character in the science fiction television series Stargate SG-1, played by Corin Nemec.

He is a native of Kelowna who was witness to Daniel Jackson's sacrifice to save the planet. After Daniel's death, he brought Naqahdriah to the SGC, hoping that it would use it in better ways than they were in Kelowna, and became a member of SG-1 for a year. He is a quick study; he can absorb a great amount of knowledge in a small amount of time. Even though it took time to get accepted, he managed to earn everyone's respect including Jack O'Neill's. When Daniel returned in season 7's episode "Fallen", Jonas decided to go back to Kelowna and became a peace negotiator for his people.

Even though he left at the beginning of season 7 (Homecoming), he comes back in Fallout (714) to ask for SG-1's help to save his planet from destruction.