This chapter reviews empirical findings on the correlates of mental health care use among disaster victims, organized within the behavioral model of health care use. It presents background literature on correlates of mental health care use among victims of traumatic events and theoretical models used to explain treatment utilization. Evidence from national community samples of civilians and military personnel also supports a relationship between both posttraumatic stress disorder (PTSD) diagnosis and severity with mental health care utilization. Several models explaining health care utilization have been proposed, including the illness behavior model, health belief model, and others, all of which are relevant to mental health care utilization. The chapter also reviews the literature on correlates of mental health care use among disaster-affected persons in particular. The statistical analysis of mental health care utilization data is associated with several issues that are often difficult to overcome, limiting previous investigations' findings.