Background: In diabetes mellitus, abnormal thyroid hormone levels are observed. Insulin and iodo-thyronines regulate the metabolism of carbohydrates, proteins, and lipids; the lack of these hormones slows the development of diabetes, whereas elevated amounts are diabetogenic. Insufficiency or excess of Insulin and thyroid hormones leads to dysfunction. Aims and Objectives: To investigate if thyroid function tests should be incorporated into the diagnostic procedure for type 2 diabetes. Materials & Methods: Santosh Medical College and hospital, Ghaziabad, Department of Medicine, on patients who will be visiting the Medicine OPD of Santosh Hospital Ghaziabad. Due to the fact that this hospital serves all segments of society, the sample taken from this hospital accurately represents the Indian population from 1 June 2019 to 31 May 2020. The trial will comprise 500 individuals with type-2 diabetes mellitus who randomly present to the Santosh hospital, regardless of age or gender. Results: Between 40 and 49 years, there were 97 patients with Type 2 diabetes, 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 evaluated in 500 type 2 diabetic patients at the Santosh hospital during a two-year period; sex preponderance was also detected in 170 diabetic patients with thyroid dysfunction. The significantly higher prevalence of thyroid dysfunction (1.34 percent) among people with type 2 diabetes. 64% of the total number of diabetic patients were female, indicating a significant female preponderance in the study group. The biggest majority of diabetics are between the ages of 50 and 59.