Overkill may refer to:

• Overkill (term), the use of excessive force or action to achieve a goal
• Surplus killing, when a predator kills more prey than it can eat
• Overexploitation, depletion of a natural resource through overharvesting
  • Overfishing
  • Overkill hypothesis, a proposed cause of Quaternary extinction

• Overkill (G.I. Joe), a character in the G.I. Joe universe
• Overkill (Transformers), a character in the Transformers universe
• Overkill, a character in the Marvel Comics O-Force team
• Scarlet Overkill, main antagonist in Minions (2015 film)

• Overkill (comic book), a British comics anthology
• Overkill (novel), a 2007 novel by Vanda Symon
• Overkill, a 1966 spy novel by William Garner
• Overkill, a 2001 true crime book by Lyn Riddle about the 1991 murder of Laurie Show

• Overkill (band), an American thrash metal band from New Jersey
  • Overkill (EP) an EP by the New Jersey band, or the title song
• Overkill L.A., originally Overkill, an American speed metal/hardcore band from Los Angeles
• Overkill (Motörhead album), a 1979 album by Motörhead
  • "Overkill" (Motörhead song), 1979
• Overkill (Savant album), 2013
• "Overkill" (Men at Work song), 1983
• "Overkill", a song by Holly Humberstone, 2020
• "Overkill", a song by Kosheen from Damage, 2007
• "Overkill", a song by MC Cheung from This is MC, 2023

• "Overkill" (Murder Most Horrid), a television episode
• Overkill, a 1987 film directed by Ulli Lommel

• Overkill (Flying Buffalo), a 1977 role-playing game adventure
• OverKill (video game), a 1992 vertical scrolling shooter
• The House of the Dead: Overkill, a 2009 rail shooter gun game
• Overkill Software, a Swedish video game developer
• Overkills, finishing moves in the video games Eternal Champions and Eternal Champions: Challenge from the Dark Side

• Overkiller, a music DVD by Die Ärzte
• Superfluous (disambiguation)
• Third wheel (disambiguation)