The Transnationalisation of Turkish Islam builds on current academic debates pertaining to the use of religion in global politics. By examining how and why religion is used as a tool for foreign policy aims, as well as for perpetuating a state’s identity and institutional capacity at home and abroad, the book presents a theory-informed discussion on contemporary Turkey’s transnational politics of religion from a comparative perspective. The country’s use of religion as a political tool outside of its borders has been studied in Continental Europe, Africa, Asia, and the Balkans thanks to extensive fieldwork and interviews conducted between 2016 and 2020. The book investigates how and why Turkey has implemented similar tools with different aims in different geographic territories and the underlying material and normative motivations for this pursuit. The main argument presented in the study is that Turkey, under the rule of the Adalet ve Kalkinma Partisi (AKP) (Justice and Development Party), employs religion for three fundamental reasons: to bolster its regional and global influence, to access regions or groups that are difficult to reach through traditional foreign policy tools, and to alter domestic political balances or amass power. The Transnationalisation of Turkish Islam will appeal to students and scholars of political science, international relations, and public policy.