The 2nd FINA World Youth Swimming Championships, or 2008 Youth Worlds, were held on July 8–13, 2008, in Monterrey, Nuevo León, Mexico.
The Championships were held at the Aquatics Center of the Universidad Autónoma de Nuevo León (Centro Acuático Olímpico Universitario). In May 2008, this same pool hosted the swimming portion of the 2008 Mexican National Olympiad, which served as the country's selection meet for Mexico's teams to the 2008 Olympics.
The male participants had to be 18 years or younger on the 31 December 2008 (i.e. born 1990 or later). The female participants had to be 17 years or younger on the 31 December 2008 (i.e. born 1991 or later).