The following categories exist on the wiki, and may or may not be unused. Also see wanted categories.
- Kilche Sea (30 members)
- Kilche Sea/Cities (2 members)
- Kilche Sea/Settlements (2 members)
- Kintaka (4 members)
- Kintaka/Geography (1 member)
- Kintaka/History (2 members)
- Kintaka/Locations (1 member)
- Kintaka/People (2 members)
- Kirnashal (3 members)
- Kirnashal Sea (2 members)
- Kishar (1 member)
- Kiyashe (4 members)
- Kiyashe/Cities (2 members)
- Kiyashe/Geography (1 member)
- Kiyashe/History (2 members)
- Kiyashe/Locations (1 member)
- Kiyashe/Settlements (2 members)
- Koamun (4 members)
- Koamun/Cities (1 member)
- Koamun/Geography (2 members)
- Koamun/History (3 members)
- Koamun/Locations (2 members)
- Koamun/Settlements (1 member)
- Kobolds (4 members)
- Korigan/Geography (1 member)
- Koritan (15 members)
- Koritan/Cities (1 member)
- Koritan/Geography (6 members)
- Koritan/History (14 members)
- Koritan/Locations (7 members)
- Koritan/People (2 members)
- Koritan/Settlements (1 member)
- Korymbos (7 members)
- Korymbos/Cities (3 members)
- Korymbos/Geography (1 member)
- Korymbos/History (3 members)
- Korymbos/Locations (2 members)
- Korymbos/Settlements (3 members)
- Kreshensage (2 members)
- Kreshensage/Geography (1 member)
- Kreshensage/Locations (1 member)
- Kudurru (4 members)
- Kudurru/Geography (2 members)
- Kudurru/History (3 members)
- Kudurru/Locations (2 members)
- Kyamita (9 members)
- Kyamita/Cities (1 member)
- Kyamita/Geography (1 member)
- Kyamita/History (4 members)
- Kyamita/Locations (2 members)