CP1

CP1 may refer to:


 * CP1 (classification), a disability sport classification specific to cerebral palsy
 * Am star, a class of chemically-peculiar stars
 * Chicago Pile-1, the World's first artificial nuclear reactor
 * Complex projective line ($$\mathbb{CP}^1$$), or Riemann sphere, in mathematics
 * Vektor CP1, a South African pistol
 * Warren CP-1, an experimental monoplane
 * CP1: an EEG electrode site according to the 10-20 system
 * Pasir Ris MRT station, MRT station code
 * Cours Préparatoire 1re année, first year of primary education in the French-like education system (e.g. Côte d'Ivoire)