IPO (disambiguation)

IPO may refer to:

 Initial public offering of a corporations' shares to the public
 Intellectual Property Office (disambiguation), a government agency in many nations
 Intellectual Property Owners Association
 International Philosophy Olympiad
 International Progress Organization, an organization dealing with world affairs, based in Vienna
 Instituto Português de Oncologia, in Portugal
 IPO (station), a metro station at the University of Porto, Portugal
 Israel Philharmonic Orchestra
 IPO Model (Input, Processing, Output), a conceptual model of computer systems
 Interprocedural optimization, a method of optimizing computer programs
 Instrumentum Pacis Osnabrugensis (Treaty of Osnabrück), one of the two treaties of the Peace of Westphalia
 Impersonating a police officer