Malnutrition seriously affects the health of elderly. The objective of the study is to determine the variation of nutritional status of elderly with respect to their socio economic and demographic characteristic. For this, a sample of four hundred elderly respondents have been selected randomly from Sunamgonj district in Bangladesh during 2019. Mini Nutrition Assessment Short Form (MNA-SF) is used to assess the nutrition status of elderly. Percent frequency distribution, t-test and F-test are used to analyze the data. It is observed from the analysis that only a few (0.58 percent) elderly belongs to normal nutrition status. The rest of the elderly are suffering from malnutrition (39.62 percent) and at risk of malnutrition (59.8 percent). The study findings show that socio-demographic characteristics like occupation, marital status, age, place of residence, taking care and family type have significant role on the variation of nutrition status of elderly. Therefore, policymakers, GO and NGO should come forward to develop the nutrition situation of elderly especially in Sunamgonj district of Bangladesh.