This study evaluated the relationships of emotional self-efficacy, stressful life events, and social support with mood disturbance among women diagnosed with breast cancer who live in rural communities. Eighty-two women completed measures of demographic characteristics, medical status, and psychosocial variables. Using multiple regression analysis, we found that greater mood disturbance was related to having less emotional self-efficacy (p < 0.001) and to having experienced more stressful life events (p = 0.02), while satisfaction with social support was not significantly related to mood disturbance (adjusted R2 = 0.39). Women living with breast cancer in rural communities who have experienced multiple stressful life events may have an increased risk for mood disturbance, whereas having greater emotional self-efficacy may provide resilience against mood disturbance.