The special collection on Computational Approaches to Enable Smart and Sustainable Urban Systems is available in the ASCE Library (https://ascelibrary.org/jccee5/computational_smart_sustainable _urban_systems).The world is rapidly urbanizing. By 2050, more than 66% of the world's population will reside in cities (United Nations 2014). As civil engineers, we will play a crucial role in providing access to reliable, clean, and sustainable sources of water, energy, and air to this next generation of urban citizens. Recent advances in sensing and computing technologies and the rise of the smart city movement have led to the rapid availability of new data streams on everything from energy usage to infrastructure health to human activity. However, major challenges exist on how such data can be utilized and leveraged to design, operate, and manage smarter and more sustainable urban systems.Within the academic community, there is a growing body of researchers tackling challenges and developing new computational and data-driven methods for enabling smart and sustainable urban systems. The purpose of this special collection is to publish a curated set of articles representative of this growing community of scholars. We would like to thank the editor in chief (Professor Raymond Issa) and associate editors (Professor Fernanda Leite and Professor Vineet Kamat) of the ASCE Journal of Computing in Civil Engineering for supporting this effort and stewarding the peer review process. We are also grateful to the academic community for their strong response to our call for papers and hope that this collection will help encourage new collaborations and synergies across the broad interests of researchers interested in smart and sustainable urban systems. © ASCE 02019001-1 J. Comput. Civ. Eng. J. Comput. Civ. Eng., 2019, 33(6): 02019001 Downloaded from ascelibrary.org by 44.224.250.200 on 07/15/20. Copyright ASCE. For personal use only; all rights reserved. © ASCE 02019001-2 J. Comput. Civ. Eng.