Marcus Williams (born December 12 1977 in Oakland, California) is a former backup tight end for the Oakland Raiders who was forced to retire in 2003 after teammate Bill Romanowski broke his eye socket with a punch.

Marcus Darrell Williams (born December 3 1985, in Los Angeles, California) is an American professional basketball player for the NBA's New Jersey Nets. In the 2006 NBA Draft, he was the 22nd player selected in the 1st round. Prior to the NBA, he played for the Connecticut Huskies. During his college career, he was known for his tremendous court vision and excellent passing.

Marcus Williams (born November 18, 1986 in Seattle, Washington) is an American professional basketball player who formerly played small forward and shooting guard for the San Antonio Spurs of the National Basketball Association. He is currently the starting small forward and leading scorer of the Austin Toros of the NBA's D-league.

Marcus Williams (born 8 April 1986, Doncaster) is an English professional football player for Scunthorpe United.

Williams signed for the club on 1 July 2003 and wears the number 17 shirt. He plays left back for the club and is well known for his pace and runs up the left wing.

As well as his team mates Billy Sharp and Andy Keogh, Williams has been under close watch from large clubs from both The Championship and The Premiership with some rumours of even Liverpool in the running.

He has recently refused to sign a new contract at Scunthorpe meaning that he is set to leave Glanford Park during the summer.