Bub or BUB may refer to:

• Bub Asman (born 1949), American film editor
• Bub Bridger (1924–2009), New Zealand writer
• Bub Carrington (born 2005), American basketball player
• Bub Kuhn (1899–1956), American baseball player
• Bub McAtee (1845–1876), American baseball player
• Bub Means (born 2001), American football player
• Bub Strickler (1938–2005), American racecar driver
• Bub Walker (1907–1963), American football player and coach
• Bub Weller (1902–1993), American football player

• Bub, a playable character in most of the Bubble Bobble video games
• Bub (film) (English 'Father'), 2001 Kashmiri-language movie
• Belgische Unie – Union Belge, a political party in Belgium
• BUB Seven Streamliner, an American-built motorcycle that held the motorcycle speed record from 2006 to 2008 and 2009 to 2010
• The ISO 639-3 code for the Bua language, spoken in Chad
• Lil Bub (2011–2019), a female cat and Internet celebrity known for her unique appearance

• Human genes:
  • BUB1, budding uninhibited by benzimidazoles 1 homolog (yeast)
  • BUB1B, budding uninhibited by benzimidazoles 1 homolog beta (yeast)
  • BUB3, budding uninhibited by benzimidazoles 3 homolog (yeast)
• Buba, river in Guinea-Bissau
• Bubb (disambiguation)
• Bubba, a relationship nickname formed from brother
• Bubble (disambiguation)
• All pages with titles beginning with Bub
• All pages with titles containing Bub