The Regional Science Association International (RSAI) and the Faculty of Economics and Management of Sfax (University of Sfax) are organising the first international conference on sustainable regional development in cities and territories in the developing world. The conference aims to bring together leading scientists, researchers and academics to exchange and share their expertise and knowledge on all aspects of sustainable development at the scale of cities and territories. It also serves as an interdisciplinary platform to discuss existing trends and challenges and responses adapted to the context of developing countries.