Purpose: This study examines family and peer academic social supports as correlates of academic motivation and first-semester GPA. Design/methodology/approach: Using a correlational design, 468 first-semester college students completed an online survey. Demographic characteristics, high school GPA and first-semester GPA were gathered from institutional data and linked to student survey responses. Findings: Bivariate and multiple regression analyses revealed that family and peer academic social supports are predictive of academic motivation and first-semester GPA. The relationships identified were small- to medium-sized and of theoretical and substantive interest. Research limitations/implications: The main limitations of the study are the measures are self-reported and the study is correlational, the latter limiting the strength of causal inferences. However, the study provides further understanding of the importance of college students' family and peer social supports in relationship to academic motivation and achievement. Practical implications: The research has practical implications for higher educators developing programs to improve family and peer social support. If future research establishes causal relationships, interventions to enhance family and peer academic supports may prove beneficial in promoting academic motivation. Further, encouraging families to broadly discuss academic topics may be ineffective in terms of academic self-efficacy and achievement for historically underrepresented students. Originality/value: This study makes a unique contribution to the literature by establishing relationships between family and peer supports with academic motivation. Statistical interactions between family and peer supports and with demographic characteristics in predicting academic motivation were identified. If the interactions are replicable, the findings provide avenues for future correlational and intervention research.