Background: Early therapy intervention for children with disabilities may improve functional outcomes. Access to paediatric rehabilitation services can sometimes be difficult. Objectives: To describe waiting time to receive physical therapy (PT) and occupational therapy (OT) services at rehabilitation centres for young children with physical disabilities; to examine factors associated with these waiting times. Design: Prospective cohort. Subjects: Two hundred and six children with physical disabilities, aged 6 to 72 months, referred in 2002-2004 from the Montreal Children' s Hospital and Sainte-Justine Hospital to paediatric rehabilitation centres. Measures: Data on date of referral, age, gender and diagnosis were obtained from the hospital databases. Data on date of first PT or OT appointments at the rehabilitation centre, family socio-demographics and disability severity (WeeFIM) were obtained during parental interviews. Results: Half of the sample waited more than 7 and 11 months for PT and OT services, respectively. Shorter waiting time was significantly associated with younger child' s age and referral to one particular rehabilitation centre. Conclusion: Children with physical disabilities experience long waiting times for PT and OT rehabilitation services. Strategies to improve timely service delivery are needed.