The 13th Canadian Workshop on Information Theory will take place in Toronto, Ontario, Canada from Tuesday, May 28, to Friday, May 31, 2013. Previously unpublished contributions from a broad range of topics in information theory and its applications are solicited, including (but not limited to) the following areas: Coded modulation, Coding theory and practice, Communication complexity, Communication systems, Cryptology and data security, Data compression, Detection and estimation, Information theory and statistics, Network coding, Interactive information theory, Pattern recognition and learning, Quantum information processing, Shannon theory, Signal processing, Cognitive radio, Cooperative communication, Multi-terminal information theory, and Information theory in biology. International researchers are welcome to attend and present research at this event.