Background and objectives: Polycystic ovary syndrome (PCOS) is the most common endocrinopathy of women in the reproductive age group, characterized by chronic anovulation, hyperandrogenism and polycystic ovarian features on ultrasound. Thyroid dysfunction and PCOS are linked to each other since several years both of them pose independent risk of ovarian failure and pregnancy related complications. The present study aimed to investigate the association between polycystic ovarian syndrome and thyroid disorders by determining the polycystic ovarian women with abnormal thyroid function test (T3, T4, TSH) and identifying the demographic features of the study participants. Patients and methods: This study was conducted from the first of April/2015 to the first of April/2016 in the Maternity Teaching Hospital in Erbil City/ Kurdistan region/ Iraq. Total of 50 women in reproductive age/ (15-45) years had been enrolled in the study including women who had PCOS (2 of 3 Rotterdams criteria) .Thyroid function test (T3, T4, TSH) was done for them at the hospital laboratory and the results were recorded. These data entered into excel separate sheet and analyzed. Results: About half of PCOS patients were between 26-35 years old. Thyroid disorders were detected in 16% of patients and the rest were euthyroid. Hypothyroidism constitutes the major proportion of thyroid disorders in (PCOS). Conclusion: 1-There is a possibility of causational relationship between thyroid dysfunction and PCOS. 2-The most common thyroid disorder in PCOS is hypothyroidism. 3-Thyroid function test is necessary in patient with PCOS.