Research on transactive memory systems (TMS) has been conducted in a variety of teams, a range of task types and increasingly, in settings around the world. Despite this proliferation, there has been relative inattention to contextual factors that produce TMS and explain heterogeneity in the TMS to team performance relationship. TMS studies are typically conducted in homogeneous settings (i.e., teams located in a single country) and often with sources of potential variation (i.e., environmental volatility, leadership, team human capital, and diversity) in TMS development controlled. Collating these individual studies, we use meta-analytic techniques to illuminate key contextual factors that may shape TMS and influence the TMS-performance association. Using 76 empirical studies representing 6,869 sampling units, we find that the strength of the TMS to performance relationship varies, depending on features of the national cultural context-the impact of TMS is stronger in cultural contexts where power distance and in-group collectivism are higher. Our results also suggest that environmental volatility, leadership effectiveness, and team human capital are positively associated with TMS, and informational and gender diversity are negatively associated with TMS development. Our findings also indicate fruitful areas for future research specifically aimed toward disentangling the effects of environmental, team, and national cultural context on TMS and team performance. (PsycINFO Database Record