DeMarcus De'Juan Nelson (born November 2, 1985 in Oakland, California) is an American professional basketball player for the Chicago Bulls. He can play at either the point guard or shooting guard positions. Nelson has played in the NBA with the Golden State Warriors.

Nelson played at the shooting guard position on the Duke Blue Devils men's basketball team. He was also the lone captain of the team for the 2007–2008 season, which was his senior year.

Games: 33, PPG: 6.2, RPG: 4.5, APG: 0.8, FG%: 40.0