Sleep difficulties for parents and infants in the first months postpartum are common and are likely to impact multiple areas of life, including parents' romantic relationship satisfaction. Empirical literature linking different indicators of sleep in the first months postpartum to concurrent and prospective relationship satisfaction is limited, however, particularly among families who experience disproportionately elevated rates of sleep difficulties postpartum. To address this gap, we examined multiple indicators of subjective and objective maternal sleep and maternal reports of infant sleep as predictors of relationship satisfaction among a sample of first-time Black mothers in relationships (