Background: Various autoimmune disorders are associated with pediatric-type-1 diabetes mellitus (DM), but are usually ill-defined and not usually suspected until the disease becomes advanced, and the prevalence of these autoimmune conditions is usually not very well defined in developing part of the world. Aim: To find out the prevalence of various autoimmune disorders associated with pediatric-type-1 DM. Materials and Methods: Total of 164 patients were screened (90 males and 74 females) during the study period of 1-year, patients were evaluated for the clinical signs, biochemical investigations and family history of autoimmune disorders in a tertiary health care center in western Uttar Pradesh. Results: Autoimmune thyroiditis was found to be most commonly associated with type-1 diabetes, followed by the celiac disease, and Graves’ disease, others less commonly seen were pernicious anemia, juvenile rheumatoid arthritis and vitiligo. Conclusion: Autoimmune hypothyroidism was found to be signifi cantly associated with type-1 diabetes, timely identification of these disorder are of paramount important for better glycemic control and to reduced the morbidity and mortality associated with the conditions.