The study was designed with the objective to find the prevalence of type 2 diabetes mellitus and risk factors among senior citizens. This hospital based, cross sectional study was conducted among 250 elderly aged 60 years and above, including senior citizens of either sex, newly diagnosed and known cases of type 2 diabetes mellitus attending community medicine and geriatric OPDs of NIUM hospital, Bengaluru during stipulated period of study. Prevalence of type 2 diabetes mellitus and risk factors were assessed. Survey data has been processed and analyzed by using the Statistical Package for Social Sciences (SPSS) 16.0 for windows. The prevalence of type 2 diabetes mellitus was found 45.6% as a whole. The highest and lowest prevalence of type 2 diabetes mellitus found among 60-65 years and above 75 years, respectively. Prevalence among Males was 30% and Females was 15.6%. Mean ± SD of FBS and PPBS of type 2 DM were observed as 162.27 + 75.18 and 257.11 + 91.95, respectively. Higher prevalence of type 2 DM patients were found among BMI above 25 kg/m2. 38.8% of prevalence of type 2 diabetes mellitus was observed among central obese senior citizens. 26% of higher prevalence of type 2 diabetes mellitus was observed among patients had positive family history of type 2 diabetes mellitus. Results confirmed an increased prevalence of type 2 diabetes mellitus among senior citizens. Higher prevalence of type 2 DM was exhibited among senior citizens those were having obesity, overweight, hypertension and family history of type 2 diabetes mellitus. Newly screened cases of type 2 diabetes mellitus showed paramount importance of extension of screening programme in elderly.