The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Categories needing attention (7 members)
- Category management templates (3 members)
- Category namespace templates (1 member)
- Character-substitution templates (10 members)
- Check for country specific content (0 members)
- Cleanup templates (1 member)
- Client applications (10 members)
- Collapse templates (0 members)
- Colorado (1 member)
- CommonState (1 member)
- Communication templates (1 member)
- Community Administration (16 members)
- Community administration (0 members)
- Computer keys (2 members)
- Connecticut (7 members)
- Construction (134 members)
- Convert to subpage (0 members)
- Convert to subpages (12 members)
- Country list (2 members)
- Cross-reference templates (1 member)
- Custom color scheme (1 member)
- Date-computing templates (4 members)
- Delaware (1 member)
- Disambiguation (29 members)
- Disambiguation and redirection templates (3 members)
- District of Columbia (1 member)
- Doctorblah (1 member)
- Documentation assistance templates (2 members)
- Documentation pages (7 members)
- Documentation see also templates (1 member)
- Documentation shared content templates (1 member)
- Documentation subpages without corresponding pages (8 members)
- Drawing (3 members)
- Editing (0 members)
- Editor Rank Images (62 members)
- Editor revision/Old images (0 members)
- Editor revision/Old information (0 members)
- Editor revision/Old text (0 members)
- En (0 members)
- En-N (0 members)
- Escape character templates (14 members)
- Examples (2 members)
- Expand template documentation (3 members)
- Florida (0 members)
- Formatting and function templates (1 member)
- Formatting templates (13 members)
- ForumLink using Community (37 members)
- Forum badges (9 members)
- Forum templates (2 members)
- Freeway (1 member)