Opinion polling for the 2021 Canadian federal election by constituency

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Before the 2021 Canadian federal election, several polling firms conducted surveys in individual ridings (constituencies). This article summarizes the published results for those specific ridings. Polling a riding is expensive, so studies are usually limited to races thought to be close or to ridings with an upcoming by-election. The results from one riding do not necessarily mirror the national swing. In a first-past-the-post system, the election is decided by the marginal seats—the ridings most likely to change hands.