It is a dataset of the study conducted with objectives of applying Demirjian’s 8 teeth method to estimate age in the Nepalese Population. We had used the Orthopantomographs of Nepalese people of age above five and less than 23 years. The radiographs were compared to the ‘Tooth Development Chart’ and each tooth studied was assigned with any one of the 10 developmental stages using Demirijian’s 8 teeth method and total maturity scores determined from them.