Aim: The aim of this study is to determine the sleep problems of preschoolers and the predictive power of children's sleep environment and daily routines on sleep problems. Method: The study, which is a cross-sectional survey study, was conducted on preschoolers in Turkey (n = 442). The data were collected based on the parents' reports about the child's sleep environment, daily routines and sleep problems. The binary logistic regression model was used to determine the risk factors which are thought to be effective in the emergence of sleep problems. Results and Conclusion: The study revealed that although different for each sleep problem, the place where the child sleeps, the person with whom the child sleeps, whether the child has a regular bedtime and wake-up time, duration of daily play time, duration of daily outdoors play time, and the time spent daily on digital technologies are effective on the risk of sleep problems.