Background Little is known about the impact of multimorbidity in childhood atopic dermatitis (AD). Objective We sought to determine the likelihood and predictors of chronic disease multimorbidity in childhood AD. Methods Data were examined for children (<18 years) in the 1996-2015 Medical Expenditure Panel Survey, an annual, representative sample of United States households. Multimorbidity was assessed using Charlson Comorbidity Index (CCI), Healthcare Utilization Project Chronic Comorbidity Indicator (HCUP-CCI) and frequency of atopic comorbidities. Results Young children with mild-moderate and severe AD, and adolescents with mild-moderate AD had higher CCI scores. Similarly, young children and adolescents with mild-moderate and severe AD had increased HCUP-CCI scores. Children with AD and atopic disease had higher CCI and HCUP-CCI scores than children with either alone. Young children and adolescents with mild-moderate and severe AD had more atopic comorbidities. Conclusions Pediatric AD is associated with increased atopic and non-atopic multimorbidity. Comorbid atopic disease may identify a subset of children with AD who particularly benefit from enhanced screening and management of multimorbidity.