This study examined demographic and military factors related to probability of hospitalization among military-affiliated adolescents and young adults (AYA) with an eating disorder (ED) diagnosis. Participants were military-affiliated AYA (spouses not included), ages 10-26 years. De-identified data were extracted from the Military Health System Data Repository from 2016-2021. Kaplan-Meier risk estimates determined the proportion of participants with a hospitalization following their initial ED diagnosis across time. Cox proportional hazard models evaluated adjusted associations of demographic and military-specific factors with probability of hospitalization. Of 7,705 participants with an ED diagnosis, approximately one in five (