Lex Luthor's mansion is the former residence of Lex Luthor. It is completely hidden, with its location not being on any map, not being visible from space and being cloaked from sight. Lex only trusted Lena Luthor with the mansion's location. He converted the basement into a bunker facility designed to protect him from any threats.
- Lex Luthor (currently in The Monitor's realm)
- Ruby Arias (temporary resident while in hiding)
- Queller (temporary resident while in hiding)
- Alex Danvers (brief resident while in hiding)
- According to Mrs. Queller, the step count between wings is 5,000.