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Static analysis is a research area aimed at developing principles and tools for veri?cation, certi?cation, semantics-based manipulation, and high-performance implementation of programming languages and systems. The series of Static Analysis symposia has served as the primary venue for presentation and disc- sion of theoretical, practical, and application advances in the area. This volume contains the papers accepted for presentation at the 11th Int- nationalStaticAnalysisSymposium(SAS2004),whichwasheldAugust26–28in Verona,Italy.Inresponse to the callfor papers,63contributions weresubmitted from 20 di?erent countries. Following on-line discussions, the ProgramComm- tee met in Verona on May 06, and selected 23 papers, basing this choice on their scienti?c quality, originality, and relevance to the symposium. Each paper was reviewed by at least 3 PC members or external referees. In addition to the contributed papers, this volume includes contributions by outstanding invited speakers: a full invited paper by Thomas Henzinger (University of Califorina at Berkeley), and abstracts of the talks given by the other invited speakers, Sheila McIlraith (University of Toronto), Ehud Shapiro (Weizmann Institute) and Yannis Smaragdakis (Georgia Institute of Technology).