OBJECTIVES: Determine the frequency of injury in younger school-age children, identify epidemiological features of injuries, investigate potential injury risk factors STUDY TYPE: Cross-sectional study METHODS AND PARTICIPANTS: The study included 379 parents of younger school-age children from the Osijek-Baranja County area. It was conducted through an anonymous survey questionnaire that the participants independently filled out during the months of April and May 2017. The survey consisted of questions dealing with sociodemographic issues and the potential risk factors for injury to their child. RESULTS: Results have shown that 20.8% of the younger school-age children have suffered an injury, 22.8% of the children suffered injuries involving multiple parts of the body, 31,7% experienced injuries in the school, and 63.3% had suffered an injury during physical activity.. The study has shown that children in families with two or three children have a greater risk of injury. No statistically significant difference was found among other socio-demographic indicators of the families of and frequency of injury. There was no correlation found between sleep habits (Sleep Behaviours) and the frequency of injuries. CONCLUSION: Injuries among younger school-age children are common in the observed population. Defining and educating on the risk factors that affect the occurrence of injuries is the key to preventing injuries in younger school-age children.