Aim: Urinary incontinence is an important problem that can arise due to neurogenic or functional reasons and can negatively affect the psychological, social and personality development of children. This study was conducted in Eskişehir province, on secondary school students in order to determine the prevalence and nature of urinary incontinence at night and/or daytime. Methods: The study universe included all secondary school students attending state elementary schools in the city center of Eskişehir (N=34.000). Ethics Committee and Provincial Directorate of National Education approval was obtained before conducting the study, which was supported by Eskişehir Osmangazi University Scientific Research Projects Commission (2017-1876) . A data collection form prepared by the researchers, and a consent form were delivered in sealed envelope to the parents via the students. The study data were collected between 09.05.2018-30.05.2018. Only volunteers were included in the study. 6957 questionnaires which have been fully completed from the 7370 surveys have been taken into consideration. The statistical analysis was carried out using the SPSS soft ware package. Results: The number of children found to have urinary incontinence was determined to be 215 (3.1%). It has been determined that 33 children (0.5%) have urinary incontinence only at daytime, 61 children (0.9%) have urinary incontinence both at night and daytime, and 121 children (1.7%) have urinary incontinence only at night. It was observed that 56% of the children suffering from urinary incontinence had not applied to any health institution for treatment before. Conclusions: Children and families with urinary incontinence need medical information and support to cover the cause of the problem and suggestions for solutions. Accompanying pathologies in cases to be detected can be determined in the early period by means of school screenings and medical evaluation and support can prevent the psychosocial and personality development of children from being adversely affected.