Materials and Methods: A descriptive study was conducted to assess the prevalence of malnutrition among under-five children. Prior permission was obtained to conduct a study. Informed consent was obtained from parents of all the under five children. The study comprised of 100 samples. The samples who met with inclusion criteria were selected by convenient sampling technique-a type of non-probability method, in which the participants were selected according to the convenient of researcher. The data collection was conducted at sanatorium and Kelambakkam. The participants were screened for malnutrition using weighing scale, the malnutrition was calculated by various formulas and interpreted with GOMEZ’S classification of malnutrition. The obtained data was analyzed and interpreted using descriptive and inferential statistics.

Results: The present study revealed that the prevalence of malnutrition among 100 under-five children, 44(44%) of them had I - degree malnutrition, 28(28%) of them had II-degree malnutrition, 3(3%) of them had III- degree malnutrition, 5(5%) of them had obesity, 20(20%) of them were normal.

Conclusion: Assessing the degree of malnutrition among children under five years old is crucial for identifying and addressing nutritional deficiencies that can have long-term effects on their health and development. Therefore, the community was educated about malnutrition and its preventive measures, awareness program and counselling to parents to prevent malnutrition for under-five children.