PURPOSE: Poor sleep is one of the most common side effects of cancer. It can persist for years beyond treatment and negatively impact quality of life and health. Cannabis is increasingly used to manage cancer treatment-related symptoms, including sleep. This study investigated the use and perceived effects of cannabis as a sleep aid in Canadian cancer survivors. METHODS: Adult Canadian cancer survivors (N = 1464) were recruited via the Angus Reid Institute and completed an online, cross-sectional survey including the Insomnia Severity Index and questions about cannabis use for sleep. Standard descriptive statistics, such as means, standard deviations, and ranges were produced for measured variables to assess the ways cancer survivors use cannabis for sleep. Frequencies were tabulated for categorical and ordinal variables. RESULTS: On average, participants (M CONCLUSIONS: Given the prevalence and potential impact, research is needed to examine the actual efficacy of cannabis as a sleep aid. IMPLICATIONS FOR CANCER SURVIVORS: It is important that cancer survivors have information on methods to help their sleep to avoid impairments to quality of life and health.