Neil Walker (born June 25, 1976 in Verona, Wisconsin) is a swimmer from the United States, who won a silver medal at the 2000 Summer Olympics and a bronze medal at the 2004 Summer Olympics. He also twice won gold in the medley relay, after swimming in the preliminaries.

He trains in Austin, Texas with Longhorn Aquatics under Eddie Reese.

Neil Martin Walker (born September 10, 1985 in Pittsburgh, Pennsylvania) is a Major League Baseball player in the Pittsburgh Pirates organization. Walker was drafted by the Pittsburgh Pirates in the first round of the draft.