Vitiligo is a melanocytic disorder characterized by depigmentation of skin and hair, which may be accompanied by neuro-ophthalmo-labyrinthic disorders. Association with several autoimmune disorders such as diabetes mellitus, thyroiditis and gastric parietal cell disease has been observed. Previous studies have demonstrated that the association between vitiligo and thyroid function abnonnalities is about 4.3%. This cross-sectional study was performed on 96 vitiligo patients who had been consecutively referred to our Dematology Clinic. Overall thyroid function abnormalities were seen in 20.8% of patients with vitiligo, significantly higher than those seen in the normal population (1.1-2.6%). Factors such as age, sex and duration of disease showed no significant positive correlation. The prevalence of thyroid function abnormalities in cases with vitiligo are higher than ranges observed in the general population.