CP4 may refer to:

CP4 (classification), a disability sport classification specific to cerebral palsy an agrobacterium strain that is resistant to glyphosate and was the source for the CP4 EPSPS gene that is used in glyphosate-resistant genetically modified crops a class of chemically peculiar stars one of the Network Rail Control Periods CP4, a specific complex projective space cP4, the Pearson symbol used in crystallography to describe a specific cubic crystal structure with four atoms in the unit cell CP4: an EEG electrode site according to the 10-20 system Punggol MRT/LRT station, MRT station code CP4