The charts below depicts federal polling data in Canada since the last federal election (September 2021), helping detect patterns and potential biases among pollsters. Each gray dot represents a single federal poll compared to the rolling 338Canada averages when the poll was fielded. The white dot with coloured stroke indicates this pollster' latest poll (middle field date appears next to it). You may toggle between the parties using the coloured buttons below.

When you hover over a pollster’s name in the legend, that pollster’s data points are highlighted in colour, revealing any patterns or "house effects" (a pollster’s tendency to systematically favour one party over another). For example, some pollsters may consistently place polls in a specific quadrant.

The charts tool offers readers a tool to better visualize Canadian polling trends and the differences between individual pollsters’ results.