Bringing together an interdisciplinary and international group of researchers working on a wide variety of cities throughout Asia, Latin America and Europe, this book addresses, rethinks and, in some cases, abandons the notions of formal and informal urbanism. This collection critically interrogates both the ways in which 'informal' and 'formal' are put to work in the governing and politicisation of cities, and their conceptual strengths and weaknesses. It does so by focusing on a wide variety of topics, from specific forms of housing and labour often traditionally linked to the formal/informal divide, to urban political negotiations, cultural practices, and ways of being in the city. The book takes stock of and reflects on how contemporary urban informality/formality relations are being produced and are/might be understood, and puts forward an enlarged and comprehensive understanding of urban informality.