Background: The present study was undertaken for assessing the incidence of oral lichen planus in a known population. Materials & Methods: A total of 1000 patients who reported with oral and maxillofacial pathologies were included in the present study. Oral examination was carried out in all the patients using mouth mirror and probe. Biopsy samples were obtained from suspected samples and diagnosis of oral lichen planus was confirmed on histopathologic examination. Incidence of oral lichen planus was recorded. Results: Overall incidence of Oral lichen planus was 2.6 percent. Out of these 26 patients, 42.31 percent of the patients had reticular type of oral lichen planus while 30.77 percent and 19.33 percent of the patients had erosive and atrophic type of oral lichen planus respectively. Conclusion: Oral lichen planus is predominant among female adults of fourth to fifth decade of life with reticular and erosive type being the most common form. Key words: Oral Lichen planus, Incidence