Objective: One recommended psychological intervention for trauma treatment in Western countries, including posttraumatic stress disorder (PTSD), is eye movement desensitization reprocessing (EMDR). However, there is a paucity of data regarding treatment interventions in low-and middle-income countries. This study examined the efficacy of EMDR for treating posttraumatic stress (PTS), anxiety, and depression among a cohort of individuals with low socioeconomic status in a conflict-affected middle-income country as well as a smaller refugee cohort. Methods: Two hundred and sixty-eight adults residing in Lebanon (male = 65, female = 203, SD gender = 0.43; µ age = 30.5, SD age = 10.49; 85% Lebanese, 15% refugees [9.3% from Syria, and 5.7% from Iraq, Palestine, the Philippines, and Other]) received EMDR therapy. Measures of PTS, anxiety, and depression were taken at three time points: before treatment (T0), posttreatment (T1), and 6-month follow-up (T2). Results: Reduction in PTS symptoms from T0 to T1,