Background: Dental age estimation aims to provide data in the field of dentistry with an accurate dental age range. To get the value of an accurate estimate of dental age, needed a method of estimation that has a standard deviation as low as possible and is validated in a specific population group of an individual. Demirjian method is a method frequently used in dental age estimation. This method uses the classification stages of the seven permanent teeth of the mandibular left side using panoramic radiographs. Demirjian method uses a standard called Demirjian standard in the form of the self-weighted score for dental stages of 7 teeth (Mandibular left side) and conversion table of maturity to dental age. Application of the Demirjian method in some countries gets the results to vary so it is recommended to make adjustments to this method. Purpose: The purpose of this study was to assess the dental age estimation using the Demirjian method on children of Javanese ethnic in the Jember region. Method: This study used an analytic descriptive study design. The samples used in this study are the panoramic radiographs were obtained from subjects who had met the study criteria were 70 samples consisting of 29 boys and 41 girls with an age range of 6-12 years. Models are grouped by gender and divided into 7 groups based on chronological age. Each tooth of the sample is calculated using the Demirjian standard. The results of this assessment are compared with chronological age and then analyzed. Result: Results of the analysis using a paired t-test test showed significant differences (p> 0.05) in the Demirjian standard with an age difference is 0.35 years for boys and 0.58 years for girls (overestimation). Conclusion: Demirjian method needs adjustment when applied to children of Javanese ethnic in the Jember region.