This study was carried out in the Tribal and Non-tribal population in eight villages under Bakavand block of Bastar district of Chhattisgarh with the objective of comparing the pattern of third molar eruption status. A total of 409 individuals aged between 18 to 50 years were examined for third molar eruption. The following instruments like dental probe, mouth mirror, torch light, measuring tape and verniar caliper used for all suspected cases followed by genealogy, interview by structured and pre tested schedule, FGDs, and case study etc. Results revealed that there was higher rate of third molar non-eruption in Non-tribal individuals (6.5%) when compared with the Tribal populations (2.9%). It could be demonstrated that third molar non-eruption increasing is more of a problem of Non-tribal than the Tribal. Civilization and change of diet seemed to be responsible for the observed differences in third molar non-eruption in both the groups in Bastar district of Chhattisgarh. This study also revealed that decreasing eruption of lower third molar and vertical eruption of upper third molar was the commonest respectively in both groups.