Background: To evaluate the prevalence of impaction of mandibular third molar. Materials & methods: A total of 60 subjects were enrolled. A total of 100 impactions were enrolled. Complete history was taken. Data were analyzed using the Chi-square test. The results were analysed using SPSS software. The p- value less than 0.05 was considered significant. Results: Overall, mesioangular impaction was the most frequent (n = 38, 38%), followed by vertical (n = 33, 33%), followed by distoangular (n = 25, 25%), and finally both horizontal and other types of impaction (n = 2, 2%). Conclusion: The prevalence of 3rd molar impaction was 25%. Keywords: Prevalence, Third molar, Impaction.