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Objective: The aim of the study was to investigate the psychometric properties of the HEXACO Personality Inventory-Revised (HEXACO-PI-R) 100 item long (HEXACO-PI-R-100-Tr) and 60 item short HEXACO-PI-R-60-Tr) Turkish forms. Methods: A total of 1174 people, 682 women and 492 men, between the ages of 18 and 73 participated in the study. The Five Factor Personality Inventory long form was administered to assess convergent validity. Of all participants 1118 people answered both inventories. Of participants 55 people completed the HEXACO-PI-Tr again after an interval of 15 days for test retest comparison. Results: The long form showed internal-consistency reliabilities ranging from 0.72 to 0.78 for six factors and from 0.29 to 0.77 for 24 subdimensions, for the short form internal- consistency reliabilities for six factors ranged from 0.58 to 0.75. Results of test retest analysis of the factors revealed correlation coefficients ranging from 0.67 to 0.80 for the long form and from 0.54 to 0.81 for the short form. Six factor construct of the inventory accounted for 27.76% of the variance in the long form and for 30.24% of the variance in the short form. Correlation coefficients as similarity measures between the factors of short and long forms were 0.92 for honesty-humility, 0.91 for extraversion, 0.94 for emotionality, agreeableness, conscientiousness and openness to experience. Convergence validity correlation coefficients between factors of the HEXACO-PI-100-Tr and factors of the Five Factor Personality Inventory ranged from 0.46 to 0.73 for the long form and from 0.45 to 0.66 for the short form. Discussion: The results show that the Turkish form of the HEXACO Personality Inventory-Revised (HEXACO-PI-R-Tr), both long and short forms, carry basic psychometric properties for practical uses and both forms show quite similar properties with the original English version. [Anadolu Psikiyatri Derg 2018; 19(0.100): 5-13]