This research note introduces the Canadian Vote Intention Dataset, a new, integrated, publicly available database of nearly eight decades of public opinion surveys from Gallup, Environics, Pollara, the Canadian Election Study and the Consortium on Electoral Democracy. The dataset contains 1,019,639 responses on Canadians’ federal vote intention as well as a suite of demographic and geographic variables, including age, gender, religion, language, education, union membership, occupation, community size, province and region. We describe the dataset and custom survey weights, as well as the R package and interactive online application we developed to accompany the dataset. We then demonstrate the dataset’s utility through new analyses of the long-term evolution of gender, education and community size gaps in Canadian party support from 1945 to 2022.