Abstract: The article develops digital constitutionalism as a common term connecting a constellation of initiatives that seek to articulate a set of political rights, governance norms, and limitations on the exercise of power on the Internet. We start by reporting on insights from an analysis of the substantive content of over 30 such documents, and make reference to the political and technological changes to which they may relate. We offer an overview of the core actors in the area of digital constitutionalism and a brief exploration of the processes by which their initiatives aim to entrench rights into law and practice. We discuss the changing sites of political and legal intervention, including a more recent focus on domestic and regional initiatives. Finally, we consider what a future research agenda could entail.