Democratic innovations are proliferating in politics, governance, policy, and public administration. These new processes of public participation are reimagining the relationship between citizens and institutions. This Handbook advances understanding of democratic innovations, in theory and practice, by critically reviewing their importance throughout the world. The overarching themes are a focus on citizens and their relationship to these innovations, and the resulting effects on political equality. The Handbook therefore offers a definitive overview of existing research on democratic innovations, while also setting the agenda for future research and practice.