The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Category management templates (3 members)
- Category namespace templates (1 member)
- Cesty (0 members)
- Check for country specific content (0 members)
- China-中国 (1 member)
- Cleanup templates (3 members)
- Client Applications (7 members)
- Closure (1 member)
- Colorado (0 members)
- CommonState (0 members)
- Communication templates (2 members)
- Community Administration (1 member)
- Computer keys (1 member)
- Connecticut (0 members)
- Construcción (3 members)
- Construction (57 members)
- Convert to Subpages (3 members)
- Countries (29 members)
- Country list (2 members)
- Cross-reference templates (1 member)
- Custom color scheme (1 member)
- Date-computing templates (6 members)
- Date mathematics templates (1 member)
- Delaware (0 members)
- Deletion request (5 members)
- Denmark (0 members)
- Deutsch (4 members)
- Disambiguation (0 members)
- Disambiguation and redirection templates (2 members)
- District of Columbia (0 members)
- Documentation assistance templates (2 members)
- Documentation pages (2 members)
- Documentation see also templates (1 member)
- Documentation shared content templates (1 member)
- Documentation subpages without corresponding pages (3 members)
- Drawing (3 members)
- Editace (4 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)
- Edição de mapas (0 members)
- En (0 members)
- En-N (0 members)
- En proceso de traducción (2 members)
- Escape character templates (7 members)
- Examples (1 member)
- Exclude in print (2 members)
- Expand Template Documentation (4 members)