Background: Diabetes mellitus (DM) and thyroid dysfunction (TD) are common endocrine diseases experienced clinically. The thyroid gland releases hormones that play a considerable role in terms of carbohydrate (CHO) metabolism. As a result, CHO metabolism was significantly affected among type 2 diabetes mellitus (T2DM) cases with TD compared to the non-diabetic (NDM) subjects. Objective: To assess the prevalence of TD in diabetic cases. Patients and Methods: This cross-sectional study investigated 193 diabetic patients. Venous samples (5 ml) were obtained from each patient via venipuncture under aseptic conditions. Body mass index (BMI), glycosylated hemoglobin (HbAlc), free tri-iodothyronine (fT3), free thyroxine (fT4) and thyroid-stimulating hormone (TSH) were evaluated. Results: ‎Prevalence of thyroid dysfunctions in diabetic patients was found to be ‎‎(9.3%). There was a significant negative relationship between fT4 and the duration ‎of DM, and statistically significant negative relationship between HbA1c and fT3 ‎level. There was negative correlation between the BMI and fT3 and fT4 levels but this ‎correlation was not statistically significant.‎ Conclusion: Thyroid dysfunctions were found to be more common in older females. Among the studied cases HbA1c was found to be significantly higher in hypothyroidism than cases of normal thyroid function.