This article draws on recent archaeological research on coastal Senegal to examine how the concept of “vernacular cosmopolitanism” can contribute to scholarship about the construction of cultural hybridity in West Africa during the Atlantic era. It argues that Senegambia between the seventeenth and nineteenth centuries was a vibrant theater of international exchanges, and that archaeological examinations of these processes can both assist our understanding of regional history and enrich discussions about the African diaspora, diasporic identities, French imperialism, and Atlantic modernity. The study of material experiences can also raise critical questions about our conceptual categories and limits to our understanding of the Atlantic past.