CP3 or CP-3 may refer to:

People

• Chris Paul (born 1985), American basketball player in the NBA
• Candace Parker (born 1986), American basketball player in the WNBA

Other uses

• CP3 (classification), a disability sport classification specific to cerebral palsy
• Child's Play 3, a 1991 American horror film
• Chicago Pile-3, the world's first heavy water reactor
• Complex projective space (${\displaystyle \mathbb {CP} ^{3}}$), in mathematics
• Mercury-manganese star, a class of chemically peculiar stars
• CP3: an EEG electrode site according to the 10–20 system (EEG)
• Riviera MRT/LRT station, MRT station code CP3