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Background and aim: Assessment of vertical dimension of occlusion is an important step in the prosthodontic treatment of edentulous patients. The Objective of this study was to determine the correlation of the lower third of the face in occlusion and facial and palm indexes in dental students of Islamic Azad University of Tehran at 2017-2018. Material and methods: In this correlation cross-sectional trial, 100 subjects (50 men &50 women( were studied. The inclusion criteria were the subject's desire to participate in the study, facial symmetry, no history of trauma in the face and palm, and no history of facial plastic surgery.Facial indices and the palm size was recorded with a bolly gauge caliper with a precision of 0.1 mm. the correlation between the height of the lower third of the face and each of the facial and palm indices was determined by Pearson correlation coefficient. Correlation coefficient (R) and consistency (R2) were calculated. Results: The mean age of male was 23.02 years and the mean age of women was 24.6 years. All indices had a moderate correlation (0.4