AbstractAimTo characterize motor disorders in children and young people with cerebral palsy (CP).MethodThis was a cross‐sectional study of 582 children and young people with CP (mean age 9 years 7 months; range 11 months–19 years 9 months; standard deviation 4 years 11 months; 340 males) attending a rehabilitation clinic at a specialized children's hospital (May 2018–March 2020). Data on motor disorders, topography, functional classifications, and non‐motor features, such as epilepsy, intellectual disability, and sensory impairments, were collected using the Australian Cerebral Palsy Register CP Description Form.ResultsFifty‐five per cent (n = 321) of children and young people with CP presented with multiple motor disorders, often affecting the same limb(s). The most common motor disorders were spasticity and dystonia (50%), spasticity only (36%), and dystonia only (6%), but 18 different combinations were identified, including choreoathetosis, ataxia, and generalized hypotonia with increased reflexes. Children with spasticity only had less severe functional deficits (p < 0.001) and lower rates of associated intellectual disability (p < 0.01) and epilepsy (p < 0.001) than those with both spasticity and dystonia.InterpretationMultiple motor disorders in children and young people with CP are common and associated with more severe functional impairment. Accurate assessment of motor disorders is essential to guide prognosis and ensure personalized evidence‐based interventions.What this paper adds More than half of children and young people with cerebral palsy presented with multiple motor disorders. Dystonia was identified in 60% of study participants. Dystonia was associated with more severe functional impairments and rates of non‐motor features.