Background: Vitiligo is a pigmentary disorder of the skin, which has been reported in association with thyroid disorders. Objective: The aim of this study was to assess thyroid disorders in vitiligo patients. Patients and Methods: In this case-control study, thyroid function tests were evaluated in seventy patients with vitiligo and compared with a control group. Results: Nine of seventy patients with vitiligo (12.9%) and one of controls (1.4%) had abnormal thyroid function tests. Conclusion: Thyroid disorders are more common in vitiligo.