Caregiver participation in child mental health treatment has been associated with better youth outcomes, but little is known about the amount and type of caregiver participation in usual care services for children. This study examined 1,255 caregivers' reports of their participation in the outpatient services their children received through a large, public mental health system in the Southwest. The majority of the caregivers reported that they participated in their child's services. Extent of participation was associated with several factors including children's physical health and caregivers' primary language, satisfaction with the services, feelings of support, and perceptions of barriers to participation. The findings offer some encouragement for the contextual fit for many evidence-based interventions that focus on caregiver involvement, and highlight which caregivers may need greater encouragement to participate in their child's care.