An ice age is a long period of reduction in the temperature of the Earth's surface and atmosphere.

Ice Age may also refer to:

• Last Glacial Period, the most recent glacial period (115,000 to 11,700 years ago)
• Penultimate Glacial Period, the glacial period that occurred before the Last Glacial Period
• Late Cenozoic Ice Age, the geologic period of the last 33.9 million years
• Little Ice Age, a period of relative cold in certain regions from roughly 1450–1480
• Pleistocene, a geologic epoch, often colloquially referred to as the "Ice Age", that includes the world's most recent repeated glaciations (2,580,000 to 11,700 years ago)
• Plio-Pleistocene, a geological pseudo-period
• Quaternary glaciation, the geologic period of the last 2.58 million years

• Ice Age (franchise), an American media franchise
  • Ice Age (2002 film), the first film in the franchise
  • Ice Age: The Meltdown, a 2006 sequel
  • Ice Age: Dawn of the Dinosaurs, a 2009 sequel
  • Ice Age: A Mammoth Christmas, a 2011 TV special
  • Ice Age: Continental Drift, a 2012 sequel
  • Ice Age: The Great Egg-Scapade, a 2016 TV special
  • Ice Age: Collision Course, a 2016 sequel
  • The Ice Age Adventures of Buck Wild, a 2022 spin-off
  • Ice Age: Scrat Tales, a 2022 spinoff series
  • Ice Age 6, an upcoming 2026 sequel
• Ice Age (1975 film), a West German drama film

• "Ice Age", Action Man episode 15 (1996)
• "Ice Age", Love, Death & Robots season 1, episode 16 (2019)
• "Ice Age", Mega Man season 1, episode 10 (1994)
• "Ice Age", The Lost World season 3, episode 11 (2002)
• "Ice Age", Time Bandits episode 7 (2024)

• Ice Age (TV program), a Russian ice show
• Ice Age Giants, a BBC series

• Ice Age (band), an American progressive metal band formed in the 1990s
• Iceage, a Danish punk rock band formed in 2008
• Ice Ages (band), an Austrian dark electro music project
• "Ice Age" (How to Destroy Angels song), 2012
• "Ice Age" (Don Toliver song), 2024
• "Ice Age", a song by Band of Susans from The Word and the Flesh, 1991
• "Ice Age", a song by Jefferson Airplane from Jefferson Airplane, 1989
• "Ice Age", a song by Joy Division from Still, 1981
• Ice Age Entertainment, an American record label

• Ice Age (Magic: The Gathering), a block of sets for the collectible card game
• Ice Age (video game), the name of several video games
• The Ice Age (novel), by Margaret Drabble, 1977

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• Global cooling