The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Animal (1 member)
- Animals (25 members)
- Baking (15 members)
- Bones (21 members)
- Building (28 members)
- Buildings (11 members)
- Candidates for deletion (8 members)
- Candidates for speedy deletion (0 members)
- Citation needed (0 members)
- Cleanup (17 members)
- Clothes (35 members)
- Community (4 members)
- Construction (1 member)
- Cooking (80 members)
- Copyright templates (10 members)
- Data Templates (1 member)
- Data templates (5 members)
- Design Templates (1 member)
- Design templates (2 members)
- Disambiguations (0 members)
- Documentation templates (3 members)
- Farming (77 members)
- Fire (16 members)
- Food (36 members)
- Formatting templates (23 members)
- Guides (3 members)
- Hidden categories (0 members)
- Images (1 member)
- Images needing improvement (0 members)
- Infobox templates (2 members)
- Items (7 members)
- Legal notices (3 members)
- Machines (10 members)
- Media (2 members)
- Medical (11 members)
- Medicine (0 members)
- Meta (4 members)
- Natural Resources (19 members)
- Navigation templates (2 members)
- Notice templates (14 members)
- One Hour One Life Wiki (20 members)
- One Hour One Life Wiki/zh (2 members)
- Pages to be merged (1 member)
- Pages to be moved (0 members)
- Pages with broken file links (15 members)
- Pies (1 member)
- Plants (48 members)
- Power Users (2 members)
- Professions (1 member)
- Raw Food (13 members)