Guy Roger Nzamba (born 13 July 1970) is a former Gabonese footballer, who played as a forward.
He also represented the Gabon national football team.
Nzamba made his debut in the Football League for Southend United on 20 September 1997, at home to Fulham in the 1–0 victory.
He came on as a substitute in the 40th minute for Paul Williams before being substituted himself in the 65th minute for Carl Beeston.
He also represented the Gabon national football team on a number of occasions.