The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- An-0 (1 member)
- Argentina (1 member)
- Bicolor cat (2 members)
- Black (5 members)
- Blind cat (2 members)
- Breeds (9 members)
- British shorthair (1 member)
- Calico (6 members)
- Calico Cat (1 member)
- Calico cat (2 members)
- Canada (2 members)
- Cat (25 members)
- Cat Images (12 members)
- Cat sound video (1 member)
- Cat with birth defects (7 members)
- Cat with dissabilities (5 members)
- Cats that meow (13 members)
- Cats with dwarfism (2 members)
- Cats with no information online (2 members)
- China (15 members)
- Color (5 members)
- Cornish Rex (3 members)
- Countries (13 members)
- Creative Commons Attribution-ShareAlike 2.0 files (1 member)
- Creative Commons Attribution-ShareAlike 3.0 files (2 members)
- Creative Commons Attribution-ShareAlike 4.0 files (59 members)
- Cross-eyed cat (2 members)
- Dead cat (0 members)
- Deaf cat (1 member)
- Deceased cat (19 members)
- Domestic Shorthair (1 member)
- Domestic shorthair (1 member)
- En (1 member)
- En-5 (1 member)
- Es (1 member)
- Es-1 (1 member)
- Female (28 members)
- File management templates (1 member)
- File namespace templates (2 members)
- General wiki templates (2 members)
- Golden chinchilla (1 member)
- Gray (4 members)
- Gray and white cats (1 member)
- Greece (2 members)
- Hatnote templates (1 member)
- He (1 member)
- He-3 (1 member)
- Internet cats (1 member)
- Italy (1 member)
- Japan (9 members)