Sleep problems have an impact on executive functioning in the general population. While children with Down syndrome (DS) are at high risk for sleep problems, the impact of these sleep problems on executive functioning in school‐age children with DS is less well documented. Our study examined the relationship between parent‐reported and actigraphy‐measured sleep duration and sleep quality with parent and teacher reports and neuropsychology assessments of executive functioning among school‐age children with DS.. To read the full article, log in using your SSSFT NHS OpenAthens details. SSOTP - You can request a copy of this article by replying to this email. Please ensure you are clear which article you are requesting.