Eating pathology (EP) is reported at alarmingly high rates among transgender and nonbinary (TNB) people. The present study investigates key associations between experiences that are common in TNB populations and EP. TNB individuals located within the United States (N = 212) who self-identified as currently experiencing disordered eating or an eating disorder were recruited from social media outlets and completed an online survey that included measures of EP, discrimination-based trauma symptoms, internalized transphobia, and gender dysphoria. The average age of participants was just over 27 years old (SD = 6.22) and the majority of participants (68.9%) were nonbinary. Data were analyzed using IBM SPSS version 28 and PROCESS 4.0. Discrimination trauma [β = .27, t(211) = 3.90, p < .001] and internalized transphobia [β = .21, t(211) = 3.03, p = .003] were significant predictors of EP in a multiple regression model. Additionally, internalized transphobia partially mediated the association between discrimination trauma and EP. Findings reinforce the need for trauma-informed and multiculturally competent provision of services for TNB populations presenting with eating concerns. Results also highlight the complex role that previously unexplored variables play in the etiology of EP for TNB populations. Implications and clinical recommendations are discussed.