Coparenting refers to the way parents or caregivers relate to each other as parents. Marital satisfaction (MS) is the subjective evaluation of the overall quality of one's relationship, including the extent to which needs, expectations, and desires are met. The coparenting relationship is distinct from, yet intimately connected to, the marital relationship. The objective of this study was to summarize and analyze current evidence regarding the association between MS and coparenting quality (CQ). Meta-analyses of 108 published and unpublished articles were conducted to evaluate the association between MS and CQ. In the meta-analysis of samples including both mothers and fathers, a medium association was found between MS and CQ, r = .41; 95% CI [.37, .44]; Q (88) = 1253.42. Separate meta-analyses of samples including only mothers and only fathers and an analog analysis of variance examining the moderating effect of parent gender found larger effects for mothers ( r = .48) than fathers ( r = .42). Maternal age, paternal education level, relationship length, and number of children were also significant moderators, with larger effects being found with families with more advanced maternal age, lower paternal education, longer relationships, and more children. The country, person reporting on CQ, and measure of CQ were also found to be statistically significant moderators. This research has implications that may inform the work of parent and family support services and contribute to positive family functioning. (PsycInfo Database Record (c) 2024 APA, all rights reserved).