HHPC may refer to:

• Hanke–Henry Permanent Calendar
• Houay Ho Power Company, operator of Houay Ho Dam
• NASA Human Health and Performance Center

• Small world (TV miniseries)
• Small World (U.S. TV series)
• Small yellow lady's slipper
• Small yellow lady's-slipper
• Small Yellow Lady's-slipper
• Small Yellow Underwing
• Small Yellow Wave
• Small–leaved supplejack
• Smalto
• Smaltz Building
• S. Malygin
• S.Mampatti
• S. Mampatti
• S. mampatti
• S mampatti
• SMAN 19 Bandung
• SMAN 1 Wanayasa
• S. Mandelbrojt
• SMA Negeri 10 Padang
• SMA Negeri 13 Bekasi
• SMA Negeri 19 Bandung
• SMA Negeri 1 Kota Mungkid
• SMA Negeri 1 Purwakarta
• SMA Negeri 1 Yogyakarta
• SMA Negeri 3 Padang