Nonet may refer to:

  • nonet (music), a composition which requires nine musicians for a performance
  • nonet, a nine line poem, with the first line containing nine syllables, the next eight, so on until the last line has one syllable; see glossary of poetry terms
  • Nonet, a proton nuclear magnetic resonance spectrum structure with nine peaks
  • Nonet, a representation of subatomic particles in the quark model
  • Nonet, another term for a box or region in Sudoku, usually a 3x3 subsection