HPAC may refer to:
Hang Gliding and Paragliding Association of Canada Hyde Park Art Center, in Chicago Hyogo Performing Arts Center, in Japan Health Policy Advisory Committee, oversees Major League Baseball drug policy H/P/A/C, an abbreviation for Hacking/Phreaking/Anarchy/Cracking (or sometimes Carding) Heating, Piping, Air Conditioning, similar to HVAC HPAC Engineering, a mechanical systems engineering magazine Holy Pentecostal Assembly Churches High Performance Analytics and Computing, e.g. in the Human Brain Project.