We have developed a composite Canadian seismicity catalog (CCSC) containing seismicity data to 2009. The primary source of information for the CCSC is the seismicity catalog from the Geological Survey of Canada. Location, magnitude, and focal depth parameters are then supplemented by the addition of available complementary data from other sources. For each event, the set of all available magnitude types is compiled, and a preferred conversion to moment magnitude is provided. The CCSC provides a valuable database for earthquake hazard analysis of major Canadian cities.