Bottom can refer to:

• the buttocks
• bottom (sex)
• bottom (BDSM)
• Bottom (band)
• Nick Bottom, a character from Shakespeare's A Midsummer Night's Dream
• Bottom (TV series), a British sitcom and stage show
• The bottom quark, a subatomic particle
• Bottom element, in lattice theory and related branches of mathematics
• The bottom type, or empty type, in type theory.