BackgroundYoung children with an intellectual disability have a higher risk of developing challenging behaviour (CB). Early identification of risk factors for CB allows for earlier intervention. The aim of the current study was to assess the prevalence and correlates of CB in preschool‐aged children with an intellectual disability in Riyadh (Saudi Arabia).MethodsOne hundred twenty parents of preschool‐aged (3–6 years old) children who had been diagnosed (DSM‐5 criteria) with an intellectual disability completed an online cross‐sectional survey that included demographic, CB and child adaptive skills measures. The relationship between CB and 15 potential correlates (e.g. gender and degree of disability) was examined using independent samples t‐tests and chi‐squared tests.ResultsMost preschool‐aged (3–6 years old) children with an intellectual disability exhibited CB (78.8%, 95% CI [70.3, 85.8]), with a 63.2% prevalence rate for self‐injurious behaviours (95% C [53.8, 72.0]), a 57.6% rate for aggressive destructive behaviours (95% CI [48.2, 66.7]) and a 25% rate for stereotypy (95% CI [17.7, 34.0]). The likelihood of a child engaging in self‐injurious and stereotyped behaviours was higher in those with autism and intellectual disability. Children with Down syndrome displayed fewer stereotyped behaviours. Low adaptive skill levels were associated with increased overall CB, self‐injurious and stereotyped behaviours.ConclusionsThe identified correlates of CB in this population and cultural context align with the international evidence base. Findings have implications for the importance of early systematic screening of CB in preschool‐aged children in Saudi Arabia and other similar contexts. Preventative measures are suggested for preschool‐aged children with an intellectual disability who are more likely to demonstrate CB, such as those with autism and poor adaptive behaviours.