Background: Nutritional Iodine deficiency leading to problems of development and endemic goiter were thought to be confined to Himalayan and Sub Himalayan regions. Isolated studies by independent investigator (9, 10) as well as multi-centric national study by the Indian council of Medical research in the eighties showed country wide. Aims & Objectives: To study the relationship between HbA1c and serum TSH levels Methods & Materials: 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: Correlation between HbA1c and TSH is .345, which is a weak positive correlation. The correlation between two variable is significant with a P value .001. Table shows as the TSH value increases HbA1c also increases but with a weak positive correlation. Conclusion: 54 individuals, or 10.8% of the overall study population, are between the ages of 50 and 59, which has the highest incidence of thyroid abnormalities among type 2 diabetes patients. A total of 73 individuals, or 14.6% of the overall study group, had a duration of diabetes between 1 and 5 years. The current analysis demonstrates a clear female preponderance, with an overall prevalence of 34%. On the basis of the findings of the present study, it is advised that individuals with type 2 diabetes undergo screening for thyroid disorders. However, further data is required, which can be obtained through other, larger studies.