This study examines the association between marital quality and personal well-being using meta-analytic techniques, analyzing effects from 93 studies. The average weighted effect size for cross-sectional studies was .37, and for longitudinal studies, it was .25. Several variables moderate this association, including gender, marital duration, measurement source, data collection year, and dependent variable treatment. Longitudinal effects are more likely to be uncovered with standard measurements, and future research should use samples homogeneous in marital length. The longitudinal finding that the strength of the association is stronger when personal well-being is treated as the dependent variable supports previous theorizing. The study expands the definition of personal well-being to include multiple components and includes both standard and nonstandard measures. The results confirm a positive relationship between marital quality and personal well-being, both concurrently and over time, with several moderating effects for sample, study, and design characteristics. The study also highlights the need for more longitudinal research to understand the mechanisms underlying this association and to explore gender differences and similarities.This study examines the association between marital quality and personal well-being using meta-analytic techniques, analyzing effects from 93 studies. The average weighted effect size for cross-sectional studies was .37, and for longitudinal studies, it was .25. Several variables moderate this association, including gender, marital duration, measurement source, data collection year, and dependent variable treatment. Longitudinal effects are more likely to be uncovered with standard measurements, and future research should use samples homogeneous in marital length. The longitudinal finding that the strength of the association is stronger when personal well-being is treated as the dependent variable supports previous theorizing. The study expands the definition of personal well-being to include multiple components and includes both standard and nonstandard measures. The results confirm a positive relationship between marital quality and personal well-being, both concurrently and over time, with several moderating effects for sample, study, and design characteristics. The study also highlights the need for more longitudinal research to understand the mechanisms underlying this association and to explore gender differences and similarities.