This chapter examines the potential for accelerating a convergence between fields of research associated with digitalisation (incorporating disciplines of sensing, data science, data analytics, and information technology) and urban-sustainability transition (relating to disciplines such as planning, design, environmental science, economics, transport, and politics), acknowledging that the threads of such linkages have been emerging over decades. Convergence research is a fundamental underlying principle of scientific progress that assembles and integrates all relevant capabilities to answer contemporary grand challenges. It is a frontier area for applied research that is critical for an accelerated transition to a green economy and sustainable urban development—two mission-scale challenges of the twenty-first century. The framework for this chapter comprises four interconnected innovation arenas associated with digitalisation that together constitute a basis for more rapidly advancing urban-sustainability research and development. These are information and communications technologies and digital infrastructure platforms that enable stakeholder engagement across distributed collaborative networks, advances in data science, and advanced urban analytics that support integrated urban analyses and decision-making.