Age estimation plays an indispensable role in forensic practice as it majorly involves civil or criminal matters. There are several methods utilized for age estimation on living as well as on deceased individuals which are based on dentition, ossification centers, lateral cephalograms, long or short bones. Among such diverse methods of age estimation, dental age estimation is a widely acceptable technique as it provides more reliable results. The present study aimed to evaluate and compare the applicability of the Demirjian, Willems, and London Atlas methods of dental age estimation in the growing children population of Northern part of the Indian population. The study includes 500 orthopantomagrams (OPG’s) for radiographic evaluation of 500 subjects (249 males and 251 females) of age ranging 6 to 16 years. Dental age was calculated using Demirjian, Willems and London Atlas methods of each subject and compared with the chronological age of the subject. In order to determine whether there is a significant difference between the chronologic age and the estimated dental ages, one-way analysis of variance (ANOVA) and t tests were utilized. The Demirjian technique overestimated boys and girls in the studied population, whereas the Willems and London Atlas methods underestimated them. Comparatively more precise and dependable findings were obtained using the Willems method of dental age assessment in Northern part of the Indian population.