This dataset contains a comprehensive and comparable database of Canadian emissions reduction policies across federal, provincial and territorial orders of government. The dataset comprises two database files (both .csv and .xlsx formats) in English and French. Source data is primarily in text format and from a variety of government and non-government sources. These sources include federal biennial reports to the United Nations Framework Convention on Climate Change (UNFCCC); provincial, territorial, and federal climate plans; and past work by Navius Research Inc. and the Canadian Climate Institute to build a Canadian climate policy tracker. Policy information is converted into textual categories in the database according to the codebook developed by the research team and attached to this dataset. Relevant policies are those targeting climate change mitigation (e.g., emissions reductions such as emissions pricing or the Clean Fuel Regulations), and policies to change energy use and sources (e.g., subsidizing renewable energy sources). This database is a project of the Canadian Climate Policy Partnership (C2P2). The goal of C2P2 is to inform smart, coherent and new policy options to meet Canada’s net zero transition by engaging in data-driven research on and analysis of climate policies in Canada, and supporting such activities in a broader network of researchers. For more information on C2P2, please visit the project webpage: https://spp.ucalgary.ca/school-public-policy/research/energy-and-environmental-policy/canadian-climate-policy-partnership-c2p2. The project README file contains further information on data format and versioning practices. Further details about C2P2 and the database can be found in a methodology paper, available in English only, on the Social Science Research Network (SSRN). An abridged methodology document, available in both English and French, is available on PRISM, the institutional repository of the University of Calgary. Both are linked in the Related Publications section of the database metadata.