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IPAC may refer to:

  • Infrared Processing and Analysis Center, the NASA science center which is responsible for the data processing, analysis, and archiving for NASA's infrared astronomy and astrophysics missions
  • International Plus, Advanced & Challenge Square Dance Convention, an international square dance event that has taken place every two years in Barmstedt, Germany since 1993
  • Iraq Peace Action Coalition, an antiwar organization based in Minneapolis, Minnesota
  • IpAc, a shorthand for the chemical isopropyl acetate