Fifth is the ordinal form of the number five.

Fifth or The Fifth may refer to:

• Fifth Amendment to the United States Constitution, as in the expression "pleading the Fifth"
• Fifth Avenue
• Fifth column, a political term
• Fifth disease, a contagious rash that spreads in school-aged children
• Fifth force, a proposed force of nature in addition to the four known fundamental forces
• Fifth of July (New York), historic celebration of an Emancipation Day in New York
• Fifth (Stargate), a robotic character in the television series Stargate SG-1
• Fifth (unit), a unit of volume formerly used for distilled beverages in the U.S.
• 1st Battalion, 5th Marines
• The fraction 1/5
• The royal fifth (Spanish and Portuguese), an old royal tax of 20%

• A musical interval (music); specifically, a
  • perfect fifth
  • diminished fifth
  • augmented fifth
• Quintal harmony, in which chords concatenate fifth intervals (rather than the third intervals of tertian harmony)
• Fifth (chord)
  • A chord (music), member separated from the chord's root by one of the above fifth-intervals
  • The dominant (music) or fifth diatonic scale degree, and the chord built on it
• Musical compositions
  • Symphony No. 5 (Beethoven), commonly referred to as Beethoven's Fifth
  • Fifth (Soft Machine album), 1972
  • The Fifth (Bad Boys Blue album), 1989
  • The Fifth (Dizzee Rascal album), 2013
  • The Fifth (Obie Trice album), 2019
  • 5th (Lee Michaels album), 1971
  • Fifth (The Autumn Defense album), 2014
  • "Fifths" (song), a song by deadmau5
• The Fifth (band), a hard rock band from Fayetteville, North Carolina