In order to extend previous research and inform intervention programs, the goal of the present study was to further understand variability in mother-child attachment security among high-risk families living in poverty. Mothers (65% Hispanic) and their young children who were in a home visitor program (n = 74) to connect families with basic services or who were on the waiting list (n = 27) for the program were visited at home. Mothers completed the Attachment Q-Set, the Parenting Stress Index, and a questionnaire on beliefs about the role of play in children's development and parenting efficacy in either Spanish or English. Observers assessed maternal sensitivity and the presence of appropriate play materials. Results indicated that maternal, child, and contextual variables were significantly associated with attachment security. Furthermore, greater cumulative assets were related to more secure attachment relationships.