"The government of Canada assesses with high confidence that the Russian military's intelligence arm, the GRU, was responsible" for these cyber attacks, the foreign ministry said in a statement.
The allegation comes amid the accusations against Russia by the US, Great Britain, and the Netherlands.
Earlier in the day, London and Amsterdam accused Russia of cyber attacks. The statements were promptly backed by NATO Secretary General Jens Stoltenberg and US Defense Secretary James Mattis.
All the claims were made during the ongoing NATO Defense Ministers summit in Brussels.
Western officials put forward accusations against alleged Russian hacking attacks on a regular basis, while Moscow has repeatedly denied such claims, stressing that it has no intention to interfere in other countries' internal affairs.