Problem solving is one of the hallmarks of human cognition. This term covers a wide range of behaviors, including abilities for solving unfamiliar puzzles, designing new artifacts, generating extended plans, and pursuing complex routine activities. They can involve reasoning, subgoaling, recognizing alternatives, evaluating them, and guiding search through large spaces. The study of problem solving played a crucial role in the early development of cognitive science as a field. Research on this topic revealed basic insights about the representations and processes that underlie high-level cognition. However, in recent years work on this topic has been poorly represented at the annual Cognitive Science meeting. Research has continued and advances have occurred, but have been reported mainly in other venues. This symposium aims to address that situation. We have recruited participants with impressive track records in different aspects of problem solving. Together, they will cover a variety of phenomena and computational perspectives.