Abstract Background Sleep disorders are highly prevalent in children with neurodisabilities, yet they seem under‐recognized in paediatric rehabilitation settings. The aim of this study was to assess among two groups of healthcare professionals (HCPs) working in paediatric rehabilitation: (1) sleep health practices and (2) knowledge about sleep physiology, sleep disorders and sleep hygiene. Methods We performed a cross‐sectional sleep survey among medical and non‐medical HCPs and the general population. Participants (30 rehabilitation physicians [RPs], 54 allied health professionals [AHPs] and 63 controls) received an anonymous 30‐item survey consisting of three domains: (1) general information, (2) application of sleep health practices and (3) sleep knowledge. Results RPs address sleep issues more frequently in clinical practice than AHPs. Sleep interventions mostly consist of giving advice about healthy sleep practices and are given by the majority of HCPs. While RPs demonstrated the highest scores on all knowledge domains, total sleep knowledge scores did not exceed 50% correct across groups, with AHPs and controls showing equal scores. Sleep hygiene rules closest to bedtime and related to the sleep environment were best known, whereas those related to daytime practices were rarely mentioned across all groups. A small minority of HCPs (RPs 20%; AHPs 15%) believed to possess sufficient sleep knowledge to address sleep in clinical practice. No association was found between self‐perceived knowledge and sleep knowledge scores among HCPs. Conclusions Sleep should become a standard item for review during routine health assessments in paediatric rehabilitation settings. HCPs' limited exposure to sleep education may result in feelings of incompetence and inadequate sleep knowledge levels, affecting their sleep health practices. Appropriate sleep training programs should be implemented to empower HCPs with knowledge, skills and confidence, needed to recognize and treat sleep disorders in children with ...