Colin Lewes Hanks (born November 24, 1977) is an American actor.

Hanks was born Colin Lewes Dillingham in Sacramento, California, the eldest son of Oscar-winning actor Tom Hanks and his first wife, the late producer and actress Samantha Lewes (née Susan Jane Dillingham), who died of bone cancer on March 13, 2002. His name was changed to Hanks after his parents married in 1978. He has a sister, Elizabeth (born 1982) and two half-brothers, Chester Marlon Hanks (born 1990) and Truman Theodore Hanks (born 1995) from his father's second marriage to actress Rita Wilson. Hanks attended Country School, Sacramento Country Day School, Loyola Marymount University and Chapman University. Hanks dated Rachael Leigh Cook and Busy Philipps between 1998 and 2002.

Hanks's best known film role may be in the teen movie Orange County (2002), with Jack Black and John Lithgow. His best known television role was Alex Whitman, the love interest of Katherine Heigl in the science fiction television series Roswell between 1999 and 2001. Hanks also made an appearance in an episode of The OC. He has appeared in the HBO series Band of Brothers.