This book examines the characteristics and evolution of interest groups in Portugal. Drawing from a wide array of sources - including surveys, parliamentary activities, media coverage and interviews with MPs and lobbyists – it systematically assesses interest group politics. The book analyses the main features of group population, the strategies utilised by organised interests, their interactions with key decision-makers, and citizens' opinions regarding their role in the political system. The original data provided in this book frames the Portuguese case in a broader European context, and will be extremely useful for international comparisons. It will appeal to scholars and students of European politics, interest groups, democratic theories, and public policy.