The subject of this article originates from non-canonical sources. To find out about what is considered "canon" see LOTR:Canon.
Tol Uialgaer was a non-canon location in Middle-earth in the area near Umbar, as shown in an expanded map of Middle-earth used for role-playing games. They were a group of islands to the southwest of Umbar with the city of Erelond.
The name in Sindarin means "Island (Tol) of the Twilight-Sea".