This report presents a systematic review of evaluations of marriage and relationship programs. The review analyzes 39 studies representing the highest quality evidence available in the field of marriage research and finds an average effect size of .68 for improving relationship satisfaction and .26 for improving relationship communication. The studies were screened from over 12,000 marriage research abstracts and more than 500 marriage program evaluations conducted since 1960. The current review supports evidence from previous narrative reviews and meta-analyses that marriage and relationship programs provide benefits for the couples they serve.