Thum (disambiguation)
Thum is a city in Saxony. Thum may also refer to:
- Thum, alternative name of Kreuzau in North Rhine-Westphalia
 - Thum (title), Pakistan
 - Thum (surname)
 - Thüm., taxonomic author abbreviation of Felix von Thümen (1839–1892), German botanist and mycologist