. Autoimmune thyroiditis was detected in 27 % of the patients, and significantly associated with parental consanguinity, familial autoimmune disease and goiter. It is concluded that autoimmune thyroiditis is evident on laboratory assessment of type 1 diabetic patients who were apparently euthyroid. Screening of type I diabetics for thyroid diseases should be done even in absence of clinical evidence for better glycemic control and to improve long term out come.