CPSK may refer to:

• Patriotic Convention for Saving the Country, a militia in the Central African Republic (from its French/Sango name Convention Patriotique pour le Salut du Kodro)
• Coherent Phase-shift keying, digital modulation scheme

• Pavel Sorokin (painter)
• Pavel Soukup
• Pavel Spongopaeus Jistebnicky
• Pavel Spongopaeus Jistebnický
• Pavels Senicevs
• Pavel's Seram melomys
• Pavel's Seram mosaic-tailed rat
• Pavels Steinbors
• Pavel Stepanek
• Pavel Stepanovich Kutakhov
• Pavel Stepanovic Nahimov
• Pavel Stepanovic Naximov
• Pavel Stepanovič Nahimov
• Pavel Stepanovič Naximov
• Pavel Stroev
• Pavel Stroyev
• Pavel Suchilin
• Pavel Suchkov
• Pavel Sudarikov
• Pavel Sukhoi State Technical University of Gomel
• Pavel Sukhov
• Pavel Sultanov
• Pavel Sulyandziga
• Pavel Suskov
• Pavel Suškov