We explore relational patterns of expatriates’ social networks and their impact on expatriates’ change in cultural identity while working abroad. We go beyond mono-cultural assumptions and highlight the importance of examining cross-cultural relational dynamics on maintenance and change in expatriates’ cultural identity. We argue that strong ties in dense networks are most conducive to helping expatriates stay attached to a national culture. Cultural diversity in a social network provides the impetus for cultural identity change. Cross-cultural interconnectedness within an expatriate’s social network contributes to the development of multiculturalism in one’s cultural identity. We also discuss the effect of cultural identity change on expatriation and repatriation adjustment, and provide some practical implications for individuals as well as organizations. Overall, we offer a cross-cultural social network perspective in theorizing about the expatriation experience.