Sixth is the ordinal form of the number six.

• The Sixth Amendment, to the U.S. Constitution
• A keg of beer, equal to 5 U.S. gallons or 1⁄6 barrel
• The fraction 1⁄6 (0.16666666666666666…)

• Sixth interval (music)s:
  • major sixth, a musical interval
  • minor sixth, a musical interval
  • diminished sixth, an interval produced by narrowing a minor sixth by a chromatic semitone
  • augmented sixth, an interval produced by widening a major sixth by a chromatic semitone
• Sixth chord, two different kinds of chord
• Submediant, sixth degree of the diatonic scale
• Landini sixth, a type of cadence
• Sixth (interval)

• All pages with titles containing 6th OR sixth
• All pages with titles beginning with Sixth
• The Sixth (1981 film), a Soviet film directed by Samvel Gasparov
• The Sixth (2024 film), an American documentary film directed by Andrea Nix Fine and Sean Fine
• The 6ths, a band created by Stephin Merritt
• LaSexta (lit. The Sixth), a Spanish television channel