(covers information from several alternate timelines)
In 2365, Captain Gregory Benson was the commanding officer of this ship. In this year, this ship was assigned a deep space exploration mission in Sector 032. The ship was listed on the Starship Deploy Status chart that was on display in the courtroom of Starbase 173. (TNG: "The Measure Of A Man", okudagram)
In 2369, while under the mind control of interrogators on the planet Tilonus IV, Commander William T. Riker believed that he met a woman named "Commander Bloom," who was first officer of the Yorktown, at the Tilonus Institute for Mental Disorders. (TNG: "Frame of Mind")
In 2370, Captain H. Zimmerman was the commanding officer of this ship. After departing from Theta Omicron IV, the starship arrived at Deep Space 9 on stardate 47550.1. The Yorktown was listed on the space station's arrival roster. (DS9: "Whispers", display graphic)
In an alternate future, the Yorktown was assigned near the border with the Romulan Star Empire. Admiral William T. Riker informed retired Ambassador Jean-Luc Picard that he would have the Yorktown run some long range sensor scans in the Devron system. (TNG: "All Good Things...")
Background information Edit
The USS Yorktown was the name of the central starship in Gene Roddenberry's first Star Trek proposal to NBC in 1964. The ship was named after the USS Yorktown, a World War II American aircraft carrier.