KDD 2013 will take place August 11-14, 2013 in Chicago. Welcome. It is a pleasure to welcome you to the 19th ACM SIGKDD Conference on Knowledge Discovery and Data Mining (KDD) which will be held in Chicago, USA during August 11-14, 2013. Please click here for the conference agenda. The annual ACM SIGKDD conference is the premier international forum for data mining and big data researchers and practitioners from academia, industry, and government to share their ideas, research results and experiences. KDD-2013 will feature keynote presentations, oral paper presentations, poster sessions, workshops, tutorials, panels, exhibits, demonstrations, and the KDD Cup competition. Please join us for KDD-2013 to gain new knowledge and to learn and exchange exciting new research results, leading practices, and high impact applications in big data, knowledge discovery and data mining.