The third season of The Backyardigans aired from February 1, 2008 to July 5, 2009. It contains twenty episodes.
- Although this season was originally animated in 16:9 widescreen format, all airings are presented in 4:3 fullscreen format.
- This season is available on Nickelodeon's video-on-demand service.
- This season has been released to the Canadian iTunes store.
- Gianna Bruzzese, becomes the new voice for Tasha
- Kristin Klabunde, who was Tasha's singing voice since Season 1, left after What's Bugging You?, and was replaced by Gabriella Malek, for the remainder of the season.
- Leon G. Thomas III, who singed as Tyrone since Season 2, also left after What's Bugging You, and was replaced by Damani Roberts, for a few episodes until Front Page News, and a little of Tale of the Mighty Knights: Part 1, where he is replaced by Tyrel Jackson Williams for the remainder of Season 3.
- This is the last season in which Jordan Coleman voices Tyrone, Jamia Simone Nash, sings as Uniqua, and Thomas Sharkey, sings as Austin.