South Korea-based girl group Girls' Generation have released eight studio albums (four of which were reissued under different titles), two live albums, four extended plays (EPs), and twenty-eight singles. As of November 2012, Girls' Generation has sold over 4.4 million albums and 30 million digital singles. The group has sold over 1.74 million albums in South Korea as of May 2016, and 3.48 million records, including 944,805 physical singles and 1,899,579 albums in Japan as of January 2017.
Girls' Generation debuted in 2007 with the single "Into the New World" and their self-titled studio album, which was later re-released as Baby Baby in 2008. The album spawned three more singles: "Girls' Generation", "Kissing You", and "Baby Baby". In 2009, Girls' Generation released two EPs: Gee and Tell Me Your Wish (Genie) (2009). Their second studio album, Oh! (2010) was later re-released as Run Devil Run (2010). Six months later, they released a third EP, Hoot (2010). The singles "Oh!", "Run Devil Run" and "Hoot" all claimed the top spot on the Gaon Digital Chart.
A Japanese version of "Tell Me Your Wish (Genie)", credited as "Genie", was Girls' Generation's first Japanese-language release; it peaked at number four on the Oricon Singles Chart. A Japanese version of "Gee" was also released, reaching number one on the Oricon Daily Singles Chart, making Girls' Generation the first non-Japanese Asian girl group to do so. They then released their first Japanese studio album, Girls' Generation (2011), which was certified Million by the Recording Industry Association of Japan (RIAJ) and became the highest-selling album in history by a Korean girl group in Japan. Their first original Japanese song, "Mr. Taxi", which was released as a double A-side single with a Japanese version of "Run Devil Run", reached number one on the Japan Hot 100. Girls' Generation's third Korean and fourth studio album, The Boys (2011), produced a Gaon Digital Chart number-one single, "The Boys". Repackaged versions of the third and fourth studio albums were released as The Boys (2011) and Mr. Taxi (2011), respectively.
Girls & Peace (2012), the group's second Japanese album and fifth overall, was certified Platinum by the RIAJ. The album brought forward a Japanese version of "Oh!", as well as "Paparazzi" and "Flower Power". Girls' Generation's sixth studio album, I Got a Boy (2013), was preceded by a remake of Duffy's "Mercy", titled "Dancing Queen", which debuted at number two on the Billboard K-Pop Hot 100. The follow-up single, "I Got a Boy" debuted at number one on the Billboard K-Pop Hot 100 and has sold over one million digital units. The group's third Japanese studio album and seventh overall, Love & Peace and its singles "Love & Girls" and "Galaxy Supernova" were released throughout the year. In April 2015, the single "Catch Me If You Can" was released simultaneously in Japanese and Korean, marking the first release since former member Jessica left the group. The group then released their fifth Korean studio album Lion Heart in August 2015, which produced three singles: "Party", "Lion Heart", and "You Think". A year later, the group released a single titled "Sailing (0805)", in celebration of their ninth anniversary.