Background and objectives: Age estimation of an individual has a great significance in forensic medicine. Age determination is an integral part of job & it’s a legal duty of a forensic expert & dental surgeon in so many medicolegal cases where question arises regarding Criminal responsibility, Marriage contract, Rape, Attainment of Majority, Eligibility for employment etc., in court of law. Age estimation of a person can be done through many ways, and an analysis of all possible method is best for an overall estimate. Study of Tooth development is one of the principal means, which help a forensic expert to form a fairly accurate opinion regarding the age of a person. Dental age has been used to determine a child's developmental age. Dental development is a regulated biological process. If any step of these developmental processes is disturbed or over-exaggerated, due to any reason, changes can occur in teeth development. Also, various factors, such as disputed birth records, premature birth, legal problems, and the need to verify a birth certificate for various purposes (such as admittance to a school, adoption, marriage, employment, or immigration) make identification and age determination increasingly important today. Different populations have had differing success when using bone age, dental age, or a combination of the two to evaluate growth. This study is an attempt, to determine dental age of children aged 6 to 14 years and to establish interrelationship, amongst the dental and chronological ages and their differences if any exits. Material and Method: A total of 800 patients aged 6 to 14 years who visited the Dental department at LSK Hospital in MGM Medical College Kishanganj Bihar as outpatients from January 2021 to December 2021 were screened for this cross-sectional study. The Demirjian method was used to calculate dental age. Pearson's and Spearman's correlation tests were used to determine the association between chronological and dental in the study population. Result: There was a strong positive correlation between age, dental age, and all stages of MP3 development in the male population. The same was true for females, with the exception of a moderate correlation between chronological age and dental age in the H stage of the MP3 region that was not statistically significant. Conclusion: The results of this study showed a statistically significant correlation between chronological age, dental age, and skeletal age for all subjects, with females maturing before males.