The USS Northridge was a 24th century Federation starship operated by Starfleet.
Lois Eckridge was assigned to this ship on stardate 46328.6, which was named on her personnel file. (TNG: "Eye of the Beholder", okudagram)
This starship was only mentioned in writing.
This starship was listed with other real starships in the ship list from the Star Trek Encyclopedia (4th ed., vol. 2, p. 332).