Urrdorf City was the smallest of the twenty orbital cities that orbited Duro. Disc-shaped, it was the lone survivor of the Battle of Duro during the Yuuzhan Vong War. Although lacking the hyperdrive of the larger cities, it was equipped with shield generators and powerful sublight engines, and escaped into interstellar space.
- The New Jedi Order: Balance Point (First appearance)
- The University of Sanbra Guide to Intelligent Life: The Duros"—Star Wars Gamer 2 (Mentioned only) "
- The New Jedi Order Sourcebook
- Coruscant and the Core Worlds (Mentioned only)