Canada competed at the 2017 World Championships in Athletics in London, United Kingdom, 4–13 August 2017.

On July 18, 2017, a team of 48 athletes was announced to represent the country at the championships.

[2][3] 2015 double bronze medallist and three time medallist at the 2016 Summer Olympics Andre de Grasse withdrew from the competition after tearing his hamstring in practice before the competition.

If an athlete achieves the standard and does not finish in the top two or receives an invite from the IAAF, selection to the team was up to the sole discretion of the National Team Committee.

For the 10,000m, race walks and marathon the top 3 were selected from the various Canadian Championships of those events.