Kes is a fictional character played by Jennifer Lien on the American science fiction television show Star Trek: Voyager. She is a member of a telepathic alien species known as the Ocampa who have latent psychic abilities and a life span of only nine years. Joining the starship USS Voyager's crew in the pilot episode "Caretaker", she opens a hydroponics garden and works as the medical assistant to the artificial intelligence known as the Doctor. Her storylines focus on encouraging the Doctor to develop his humanity and dealing with her Talaxian boyfriend Neelix's jealousy. She also seeks to expand upon her mental capabilities, leaving in the fourth season after her powers threaten to destroy the ship. She reappears in a season six episode and features in Star Trek: Voyager novels and short stories.

Jennifer Anne Lien is an American former actress known for playing the alien Kes on the television series Star Trek: Voyager.