Is Canada Part of North America?

Yes. Canada is the second-largest country in North America (after the USA) and the second-largest in the world (after Russia).

• Continent: North America (with USA, Mexico, Greenland, Central America, Caribbean).
• Area: 9.98 million km² (3.85 million sq mi).
• Borders: Arctic Ocean (north), Atlantic (east), Pacific (west), USA (south & northwest/Alaska).
• Geology: Sits on the North American Plate.

Canada occupies the northern ~40% of the continent. "North America" is a geographic continent; "Northern America" (UN subregion) = Canada, USA, Greenland, Bermuda, St. Pierre & Miquelon.