- For other uses, see Jan.
- See Hamlin for other articles with titles that contain, either by relationship or by coincidence, this character's surname.
Jan Hamlin was a caring, female orderly in a mental institution on Earth in 1955. She cared for James T. Kirk when he was placed in the venue after arriving in that year through the Guardian of Forever, disorientated from exposure to a mind-sifter used by Kor. Hamlin fell in love with Kirk and was a witness to his return to USS Enterprise when Spock and Leonard McCoy came to his rescue. (TOS short story: "Mind-Sifter")