As one component of the upper motor neuron syndrome, spasticity can have a significant functional impact on the child with cerebral palsy. Treatment planning requires the determination that excess tone interferes with some aspect of function, comfort, or care, and takes into consideration carefully devised goals that meet the needs of the patient and the caregiver. Treatment options include physical therapy, oral medications, chemodenervation with botulinum toxin or phenol, rhizotomy, intrathecal baclofen, and orthopedic surgery. The uses and limitations of each is discussed, and evidence for efficacy in cerebral palsy is reviewed.