Deneb II City was a settlement on the planet Deneb II.
In 2328, this was the point of destination for passengers traveling from Camus II via commercial transport. Rene Echevarria traveled on the SS Manoa, Molly Amos traveled on the SS Kogin, and Wendy Knoller and Eric Alba traveled on the SS Wisconsin. (TNG-R: "Inheritance", okudagram)
This city was only mentioned in writing.