William da Silva Oliveira (born May 31, 1984 in São Paulo, Brazil) is a former Brazilian soccer midfielder.
Born in Brazil, Oliveira began playing with local sides União Bandeirante FC and Vitória Futebol Clube. He signed with Trinidadian club W Connection's youth system in 2003, and played for the club for four years. After a brief trial period, Oliveira was signed to the Chicago Fire of Major League Soccer on May 24, 2007. However, Oliveira was released before the end of the season.