Despite the growing emphasis on co-parenting in family life, little is known about the co-parenting relationships of adoptive parents. This study examined the contributions of socioeconomic status (SES), child demands and couple relationship characteristics to reported co-parenting quality among adoptive mothers. Mail questionnaires were administered to 94 adoptive mothers in a Midwestern state. Regression results revealed that SES and child demands were largely unrelated to co-parenting quality, while couple relationship characteristics (dyadic coping, dyadic adjustment and conflict resolution) contributed significantly to co-parenting quality. Further, the co-parenting dimensions revealed different patterns of relatedness with the independent variables, providing support for the notion that co-parenting is a multidimensional construct. Implications for social work research and practice are discussed.