Background: One of the top 10 infectious diseases in the world and a major cause of death is tuberculosis (TB). The present study was to assess incidence of different types of tuberculous lesion in association with diabetes mellitus. Methods: 88 patients with history of diabetes mellitus and having complaints of cough with productive sputum for more than four weeks, loss of weight, loss of appetite, low grade fever, haemoptysis etc. of both genders were selected. All were evaluated for fasting, random blood glucose level. Results: Out of 88 patients, 54 were males and 34 females. Types of tuberculosis was pulmonary tuberculosis in 10 and extra pulmonary tuberculosis in 7 cases. Incidence of diabetes among tuberculosis patients was type 1 diabetes mellitus in 3, type 2 diabetes mellitus in 14. Socio-economic status was low in 8, middle in 5 and high in 4. Clinical features were cough with or without expectoration in 67, fever in 54, weakness & malaise in 32, loss of weight in 17, breathlessness in 53, chest pain in 26, distention of abdomen in 15, and swelling of gland in 7 cases. Types of lesions was pleurisy with effusion in 6, fibrocavitatory lesion in 2, fibroinfiltrative lesions in 3, abdominal & intestinal TB in 3, tuberculous meningitis in 2 and miliary tuberculosis in 1 case. Conclusion: Incidence of tubercolous infection in diabetes mellitus is gradually increasing. Pulmonary types of tuberculosis are more in diabetic patients.