Background: Acute malnutrition is a public health problem of epidemic proportions. Feeding approaches for infants who are under 6 months of age with severe acute malnutrition should prioritize establishing, or re-establishing, effective exclusive breastfeeding by the mother or other caregiver. The aim of this study is to identify the various risk factors and determinants of severe acute malnutrition as defined by WHO growth reference standards in infants aged below 6 months of age at district hospital in Rajasthan.