Background: Researchers have found a relationship between having food allergies and anxiety in children. Anxiety may relate to others' lack of food allergy knowledge. This study investigated the relationship between having a food allergy and self-reported anxiety among children. Furthermore, knowledge of food allergies among children without food allergies and teachers was explored. Methods: Children with food allergies and their parents each completed a perceived food allergy severity questionnaire. Children without food allergies completed a food allergy knowledge measure. All children completed a self-reported anxiety measure. Teachers completed a questionnaire investigating knowledge, attitudes, and beliefs about food allergies. Correlational analyses and analyses of variance were conducted. Results: Overall anxiety was significantly higher in children with food allergies than in children without food allergies. When controlling for the effects of sex and age, children with food allergies had significantly higher social phobia and school phobia. Teachers correctly answered 69.7% of knowledge-based questions about food allergies; children without food allergies correctly answered 62.7%. Conclusions: Findings highlight the need for an integrated approach in which families, school personnel, psychologists and other mental health professionals, and medical professionals work together to increase awareness about the multifaceted needs of children with food allergies.