Background: Abnormal thyroid hormones levels are found in diabetes mellitus .Metabolism of carbohydrates, proteins and lipids are influenced by insulin and iodo-thyronines, absence of hormones inhibits diabetes development while higher levels are diabetogenic. Excess or deficiency of Insulin and thyroid hormones results in derangement of function. Aims & Objectives: To study if thyroid function testing should be included in the investigation process for type 2 diabetes Methods & Materials: The Department of Medicine, Santosh Medical College and hospital, Ghaziabad on patients who will be attending the Medicine OPD of Santosh Hospital Ghaziabad. This hospital caters to all sections of society and thus the sample drawn from this hospital is a true representation of Indian population from 1st June 2019 to 31st May 2020. The study will include 500 patients with type-2 diabetes mellitus irrespective of age and both gender randomly presenting to the Santosh hospital. Results: The age distribution of Type 2 diabetic patients is shown between 40 and 49 years, there were 97 patients, between 50 and 59 years, there were 173 patients, between 60 and 69 years, there were 146 patients, between 70 and 79 years, there were 55 patients, and between 80 and 89 years, there were 29 patients Conclusion: The prevalence of thyroid dysfunction was studied in 500 type 2 diabetic patients at the Santosh hospital during a two-year period; sex preponderance in 170 diabetic patients with thyroid dysfunction was also identified. The significantly greater prevalence of thyroid dysfunction in patients with type 2 diabetes at 1.34 percent. There was a noticeable female preponderance in the study group, as 64% of the total number of diabetic patients were female. The greatest number of people with diabetes are between 50 and 59 years old.