Polycystic ovarian syndrome (PCOS) is one of the most common endocrine disorders in women of reproductive age. The Mediterranean Diet is a dietary model that may have beneficial effects on the outcome of the syndrome. In addition, the occurrence of eating disorders (ED) in women with PCOS is a fairly common phenomenon. Aim of this study is to investigate the adherence of women with PCOS to the MedDiet and the risk of developing eating disorders. For this purpose, two questionnaires (MedDiet score and ED Questionnaire) were distributed through social media and data was collected from 1390 women οf whom, 50,8% were diagnosed with PCOS. Based on the results of the study, it was shown that women with PCOS have statistically significant higher BMI (t(1388) =-2.717, p=0.007<0.01), EDE-Q score (t(1388) = -4.648, p=0.00<0.01) and lower MedDiet score (t(1388) =3.140, p=0.002<0.01), indicating that women with PCOS exhibit higher risk of developing eating disorders and lower adherence to MD. Both groups were divided into two sub-groups according to age, PCOS and control-young (18-29 years) and old (30-40). No significant difference in BMI was shown between the PCOS-young and PCOS-old and between PCOS-old and control-old sub-groups. On the contrary the BMI differed significantly between PCOS-young and control-young and between control-young and control-old subgroups, indicating that PCOS is related to higher BMI only in younger women in accordance with PCOS symptomatology which becomes milder with age. Interestingly, EDE-Q score followed identical patterns while MedDiet score did not. Overall, our results indicate the increased need for weight control and promoting MD among young women with PCOS, who are at greater risk for ED. However, in order to achieve this efficiently it would be important to understand the reasons why young women with PCOS don't adhere to MD.