One in a Million is the second studio album by American singer Aaliyah. It was first released on August 13, 1996, by Blackground and Atlantic Records. The album was recorded from August 1995 to July 1996 with a variety of producers and writers including Timbaland, Missy Elliott, Carl-So-Lowe, J. Dibbs, Jermaine Dupri, Kay Gee, Vincent Herbert, Rodney Jerkins, Craig King, Darren Lighty and Darryl Simmons. The album featured several guest vocalists, including Elliott, Timbaland, Treach and Slick Rick. One in a Million garnered generally positive reviews from music critics. It debuted at number 20 on the US Billboard 200 chart, selling 40,500 copies during its first week and later peaked at number 18 following its 2021 reissue, the album reached a new peak at number 10.

Within several months, the album proved Aaliyah's breakthrough and a major milestone in the careers of Elliott and Timbaland, being certified double Platinum by the Recording Industry Association of America (RIAA).

One in a Million has sold over three million copies in the United States and eight million worldwide.