Luthor refers to several things:
- "", the twelfth episode of the second season of and the thirty-second episode overall.
- The Luthor family of Earth-38
- John Henry Irons, an individual from from Earth-TUD22 that battled with Superman and was mistakenly referred to by an A.I. device as "Captain Luthor".
- Luthor Mansion, the former residence of the Luthor family on Earth-38.
- Luthor's mansion, the residence of the Luthor family on Earth-Prime.
- L-Corp, a company formerly known as Luthor Corp of Earth-38.
- Luthor Corp Naval Solutions facility, an abandoned facility.
- Luthor Corp, a company on Earth-Prime.
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