Background: Malnutrition is a factor associated with mortality, particularly for older residents in long-term care facilities. Aim: This study aimed to evaluate the Minimum Data Set-based Screening for Nutritional Problem (MDS-SNP) and Mini Nutritional Assessment (MNA) in screening malnutrition among institutionalised older adults in Taiwan. Methods: A cross-sectional research design was employed and data from 131 residents were collected in northern Taiwan. Demographic and clinical variables such as cognitive function, activities of daily living, depression status, MDS-SNP, MNA, and dietary habits were obtained from residents’ profiles. Findings: The prevalence of malnutrition and risk of malnutrition defined by MNA were 32.8% (n = 43) and 30.5% (n = 40), respectively and 59.5% (n = 78) was at risk of malnutrition according to MDS-SNP. Multivariate logistic regression disclosed that some of the MDS-SNP items such as BMI and complaints of hunger, were significantly associated with MN