Context: Childhood obesity is a serious health problem worldwide and the number of critically ill obese children is rapidly increasing in Pediatric Intensive Care Units (PICUs). Given the importance of optimal energy and nutrient delivery that may lead to improved clinical outcomes in PICUs, we addressed the nutrition support aspects of managing critically ill obese children in PICUs. Evidence Acquisition: This review was conducted on the National Library of Medicine's PubMed, Scopus, Cochrane, and Embase databases using a combination of relevant MeSH terms and keywords to provide updates on the nutritional management of obese patients in PICUs. The MeSH terms included "Child"