"Into the New World" (Hangul: 다시 만난 세계; RR: Dasi Mannan Segye) is a Korean song and the first single by South Korean girl group Girls' Generation. The single was released on August 2, 2007.

The song was produced by the founder and chairman of famous Korean music company S.M. Entertainment, Lee Soo-man.

The music video features a small amount of dance scenes. The video starts with a plane landing, followed by a silhouette of the girls forming a line and then dancing. During this, text appears saying “Into the New World, Or Not.. It’s Up to Your Choice.. [sic]”. Throughout the music video, it shows the girls doing activities, either alone or coupled with another member. The activities done by the girls are:

There are two dance settings featured in the video. The first one is a room with a white background, and the second one is a lobby of a shopping mall.

The song was originally first performed by the group in SBS's The Music Trend on August 5, 2007. "Into the New World" reached number one on Mnet's M! Countdown.

The physical edition of "Into the New World" debuted at number 5 on the chart for August 2007 compiled by the Music Industry Association of Korea (MIAK), selling 10,823 copies in its first month of release. It was the 41st best-selling CD release of 2007 in South Korea, selling 22,818 physical copies in total. In 2010, the single peaked at number 2 on the Gaon Album Chart for the chart issue dated April 18 – 24, based on physical sales. It became the 9th best-selling release of April 2010 in South Korea.

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