(We use survey data on 3,600 companies from 63 countries to test hypotheses about the internationalization of family firms (FFs) compared to non-family firms (NFFs). We find that FFs are less international than NFFs in the propensity, scale, and scope of their sales, manufacturing, services, and sourcing. However, when all or most of the family supports internationalization, FFs are significantly more international not just relative to FFs without such support but also relative to NFFs. We also find that both family governance and corporate governance are critical to garnering that support.