OBJECTIVES The purpose of this study was to examine the food allergy-related knowledge, awareness, and performance of dietitians at children's hospitals, depending on whether or not they have a clinical dietitian certificate. METHODS A questionnaire survey was administered to 41 dieticians at children's hospitals registered as a part of the Korean Hospital Association. The survey consisted of questionnaires examining general characteristics, nutritional counseling-related characteristics, and food allergy-related characteristics (food allergy-related knowledge, awareness, and performance). We examined differences according to the status of clinical dietitian certification. RESULTS The proportion of subjects who were holders of clinical dietitian certificates was 48.8%. There were differences between holders of clinical dietitian certificates and non-holders as follows. Regarding nutritional awareness and performance, ‘needs to provide nutrition counseling in children's hospitals’, ‘providing nutrition counseling services in working hospitals’, and ‘whether there is a nutrition counseling room’ scored higher among holders of clinical dietitian certificates than non-holders. Holders of clinical dietitian certificates showed higher scores for knowledge of food allergy symptoms and food allergy management than non-holders. For food allergy awareness and performance, ‘self-assessment of food allergy knowledge understanding level’, ‘awareness of open oral food challenge (OFC)’, ‘recognition of the need for education and counseling on food allergy for patients/guardians’, and ‘food allergy related educational experience’ scored higher among holders of clinical dietitians certificates than in non-holders. CONCLUSIONS Children's hospital dietitians with a clinical dietitian certificate showed high knowledge, awareness, and performance related to food allergies. It is thus necessary to employ a clinical dietitian for food allergy management in children's hospitals. In addition, training and conservative education are necessary for the management of food allergies for children's hospital dietitians.