Low-income minorities face many complex barriers to building stable and healthy relationships. AVANCE Houston, a non-profit community-based organization in Houston, Texas, developed the Strong Families, Strong Communities (SFSC) program to address such barriers by providing interactive healthy marriage and relationship skills workshops to low-income Englishand Spanish-speaking Hispanic and English-speaking African American individuals. Using a randomized control trial (RCT) design with random assignment to the 7week treatment group (n = 649) or a 12-month wait-list control group (n = 600), we examined the impact of the program on four dimensions of relationship functioning: relationship satisfaction, connectedness, and quality; and conflict resolution, at post-test and then 6 and 12 months later. Using a repeated measure multilevel model with a difference-in-difference impact estimate, we found that all four dimensions of relationship functioning improved with small effect sizes that were larger than those found in previous relationship education programs for low-income individuals (Cohen's d's of 0.18 for relationship satisfaction, 0.24 for connectedness, 0.19 for quality, and 0.20 for conflict resolution). Findings from this study provide evidence of program effectiveness on dimensions of relationship functioning for low-income minorities, comparable