The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- 1967 births (real life) (1 member)
- 1996 Twister Cast (18 members)
- 2014 deaths (real life) (1 member)
- Americans (real life) (6 members)
- Appearance templates (1 member)
- Article management templates (4 members)
- Article stubs (8 members)
- Bill Harding (1 member)
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- British (real life) (1 member)
- Browse (4 members)
- Candidates for deletion (0 members)
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- Cary Elwes (2 members)
- Cast (40 members)
- Cast (Twister) (2 members)
- Cast (Twisters) (20 members)
- Category templates (3 members)
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- Community (7 members)
- Content (1 member)
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- Daisy Edgar-Jones (2 members)
- David Born (1 member)
- David Corenswet (2 members)
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- Deceased Characters (2 members)
- Disambiguations (0 members)
- English (real life) (1 member)
- Equipment (3 members)
- Files (2 members)
- Films (2 members)
- Flags (1 member)
- Forums (6 members)
- General wiki templates (34 members)
- Glen Powell (2 members)
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- Image wiki templates (9 members)
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- Infobox templates (9 members)
- James Paxton (2 members)
- Javi (5 members)
- Jo's Team (10 members)
- Jo Ann Harding (1 member)
- Jonas' Team (1 member)
- Jonas Miller (1 member)