John Trimble was a Starfleet officer in the 24th century. He was a commander in 2364.
Prior to stardate 41547.3, according to an order sent by Admiral Kathryn Trimble of Starfleet Operational Support Services, he was to be transferred from the USS Equicon. (TNG: "Conspiracy", okudagram)
This character was only mentioned in writing. He was named after John G. Trimble, the husband of Bjo Trimble.