- For the primary universe counterpart, see John Harriman.
- See Harriman for other articles with titles that contain, either by relationship or by coincidence, this character's surname.
In the mirror universe, John Harriman was a male Terran serving as an officer in the Imperial Starfleet in the 23rd century.
By the 2270s decade, Harriman had reached the rank of Lieutenant and had been posted aboard the ISS Hornet.
In the year 2275, he attempted to transfer to the ISS Enterprise. (TOS - Mirror Universe novel: The Sorrows of Empire)