This issue of Global Missiology - English examines an array of topics related to diaspora communities. The important roles played by diaspora peoples in Christian mission are recognized today more than ever. Much study of diaspora phenomena has been conducted, but more is needed in specific relation to communities of people living in diaspora. For example, relations between diaspora churches and local indigenous churches and communities is a topic ripe for further research. Diaspora communities face challenges with respect to their changing identities, including those associated with language and generational differences. Many diaspora communities have experienced stirring revivals and desire further theological and leadership training. Using case studies in particular, the articles in this issue take up these kinds of topics and more.