Reception

When the first episode was shown during a special test screening, which was attended by Ōkawa.

other members of the series' staff, as well as several journalists and other media-related personnel in response to the hype surrounding the series' upcoming release, the audience fell into immediate silence after it ended, followed by "tremendous applause." By August 2008, over 900,000 Code Geass discs have been sold in Japan.

 Reportedly, Bandai Visual shipped over one million DVD and Blu-ray Discs related to the Code Geass franchise by November 2008, placing it among the most popular contemporary anime series in both Japan and North America. During 2008, the first volume from R2 was the fourth bestselling anime DVD and Blu-ray Disc in Japan according to Amazon.com.

Since its premiere, Code Geass: Lelouch of the Rebellion has collected numerous awards and accolades. At the sixth annual Tokyo Anime Awards held at the 2007 Tokyo International Anime Fair, Code Geass won the best TV anime series award.[55] The second season also got the award of "Best Screenplay" in the 2009 Tokyo Anime Fair. In noted Japanese anime magazine Animage's 29th Annual Anime Grand Prix, Code Geass won the most popular series award, with Lelouch Lamperouge also being chosen as the most popular male character and "Colors" being chosen as the most popular song[citation needed]. In the 30th Annual Anime Grand Prix, Lelouch won first place again and C.C. was voted most popular female character[citation needed]. At the first Seiyu Awards held in 2007, Jun Fukuyama won the award for best actor in a leading role for his performance as Lelouch Lamperouge in the series, while Ami Koshimizu won the award for best actress in a supporting role for her performance as Kallen Stadtfeld.

Furthermore, Code Geass won the award for Best TV Animation at the twelfth Animation Kobe event, held annually in Kobe, Hyōgo Prefecture, with R2 taking the award in the following year. In the 2009, Seiun Award, Code Geass R2 was a nominee in the category "Best Media Award".
Anime News Network's columnist Todd Ciolek attributes the soaring popularity of Code Geass to "the series hitting every important fan sector," with the audience appeal points ranging from a "complex cast of characters and a fast-paced story, told with Goro Taniguchi's capable direction" for "general-interest fans" to "pretty and just-a-little-broken heroes" for "yaoi-buying female fans." Carl Kimlinger also finds that the series "has the skill and energy to carry viewers over the top with it, where they can spend a pleasurable few hours reveling in its melodramatic charms." He also adds that Taniguchi "executes the excesses of his series with care, skillfully intercutting events as Lelouch's plans come together (or fall apart) and using kinetic mecha combat".

Columnist Carlo Santos of Anime News Network wrote that the franchise "in a way, [...] reflects the malaise of a generation: the realization that old, rich, powerful people have screwed up the world and that the young are helpless to do anything about it". According to him, Lelouch's actions exemplify the wish to see problems like "economic collapse, class conflict, political instability, radical extremism" solved by "Zero's vigilante methods" but Santos expresses doubt in such an approach and concludes that "the series is at its best when raising questions rather than offering a final solution".