The link between social capital (SC) and Facebook has been widely studied in the U.S., and less is known about how students from different cultures employ the site to garner SC. This paper measured network composition, communication on Facebook, and SC via questionnaires in France and the U.S. It found that American students have a greater proportion of distant to close ties in their networks and higher levels of bridging SC than French, the latter preferring bonding SC. A stronger relationship between SC and communication via Facebook was observed in the U.S. These findings are accounted for by cultural differences in relatedness.